Oshkosh County Property Assessor 2026: Search & Tax Records

by
City of Oshkosh • Winnebago County • Wisconsin

Search Oshkosh WI Property Assessments, Tax Bills & Winnebago County Land Records

People often search for an “Oshkosh County Property Assessor,” but Oshkosh is a city in Winnebago County, Wisconsin. Property values inside the City of Oshkosh are handled by the City Assessor’s Office, current real-estate tax billing and installments are handled by City Finance, and delinquent city taxes after the July settlement move to the Winnebago County Treasurer.

This 2026 guide shows how to find the City of Oshkosh property record, use the finalized 2026 assessment roll, distinguish assessed value from the later December tax bill, search a 10-digit parcel number, check current and delinquent taxes, understand Wisconsin’s Open Book and Board of Review process, avoid the City’s current installment-display issue, use free eCheck payment, check Lottery and Gaming Credit eligibility, review GIS and permit history, and search deeds through the Winnebago County Register of Deeds.

City Assessor property search and 2026 final assessment roll
10-digit parcel, address, owner and bill-number tax lookup
January / March / May / July installment routing
Winnebago delinquent tax, GIS, deed and ownership help
Search Oshkosh Property Search Real Estate Tax Open Oshkosh GIS Search Land Records
Official jurisdiction City of Oshkosh
County Winnebago County
City Assessor Dean Peters
Assessor phone 920-236-5070
Reviewed August 12, 2026
Important search correction

There Is No “Oshkosh County” Property Assessor

Oshkosh is a city, not a Wisconsin county. The city lies in Winnebago County. If the property is actually inside the City of Oshkosh, the correct valuation office is the City of Oshkosh Assessor’s Office.

Winnebago County still matters for countywide land records, delinquent city property taxes after the municipal collection period, the Real Property Lister and Register of Deeds.

This distinction prevents one of the most common Oshkosh property-search mistakes: opening the Winnebago County tax site first and assuming the absence of a current City of Oshkosh parcel means the property does not exist.

Why a City of Oshkosh parcel may not appear in Winnebago County’s tax search: the County says its Property Information search includes City of Oshkosh parcels only when there is a delinquent tax balance. For current city ownership and normal current taxes, use Oshkosh’s own systems first.
Current August 12, 2026 status

Where Oshkosh Property Owners Are in the 2026 Cycle

The 2026 City of Oshkosh assessment roll is already final. The City’s Board of Review met May 21, 2026 and finalized the assessment roll. Oshkosh now publishes the 2026 Final Assessment Roll by Parcel.
Challenging the 2026 assessment? The normal Open Book / Board of Review stage has passed. If you participated in Board of Review, use your written determination to calculate any remaining statutory review deadline.
Paying a 2025 tax bill in 2026? Oshkosh’s four city real-estate installments run through July 31. After July 31, delinquent real-estate tax collection moves to Winnebago County.
Looking for the 2026 tax bill? The 2026 assessment exists now, but the tax bill based on that assessment is a later-year-end document. Wisconsin requires 2026 property-tax bills to be issued by December 21, 2026.
Key distinction: “2026 assessment” and “tax payment made in 2026” can refer to different tax cycles. A bill paid in January–July 2026 generally relates to the prior assessment/tax-bill year, while the finalized 2026 assessment will feed the property-tax bill issued near the end of 2026.
Use the correct office

City Assessor, City Finance or Winnebago County?

City Assessor

  • 2026 assessed value
  • Property characteristics
  • Market-value questions
  • Assessment notices
  • Open Book
  • Board of Review
  • Mailing address changes
  • Residential sales questionnaire

City Finance / Tax Collections

  • Current city tax bill
  • Installment amounts
  • Online tax payment
  • Receipts
  • Escrow questions
  • Lottery credit timing
  • Interest
  • Current balance

Winnebago County

  • Delinquent Oshkosh taxes
  • Current payoff after city handoff
  • Register of Deeds
  • Deeds and mortgages
  • Parcel ownership records
  • Real Property Lister
  • County GIS
  • Certified county tax information
Most common routing mistake: The Assessor cannot answer how much you currently owe on the tax bill, and the Treasurer/Finance office does not decide whether your assessment is fair.

Choose Your Oshkosh Property Task

Find the property Start with the City Assessor’s online property-information route and verify the correct parcel.
Check the 2026 assessment Use the City’s published 2026 Final Assessment Roll by Parcel when you want the finalized assessment.
Find a tax bill Search City real-estate tax records by address, 10-digit parcel ID or bill number.
Pay current tax Use City Finance while the bill is in the city collection cycle; verify the bill image and payment amount before authorizing.
Pay delinquent tax If the city collection period has ended, move to Winnebago County Treasurer property information.
Research deed/title history Use Winnebago County Register of Deeds, Tapestry/Laredo or an in-office public terminal.

Jump to Your Oshkosh Property Search Task

Final—not preliminary

Use the 2026 Final Assessment Roll by Parcel

The City of Oshkosh publishes its current assessment roll separately from the ordinary property search. For 2026, the page lists the 2026 Final Assessment Roll By Parcel, while prior-year 2025 rolls are also available for comparison.

Use it to verify final value The Board of Review has already completed the 2026 roll, so this is more useful than an old preliminary screenshot.
Compare 2025 vs 2026 A year-over-year difference can help identify whether the parcel changed due to market maintenance, construction or property data.
Do not confuse roll with tax bill The final assessment roll establishes assessment information; levies and credits are applied later to build the tax bill.
Open Current & Prior Assessment Rolls Select 2026 Final Assessment Roll By Parcel for the finalized current-year assessment.

Verify These Six Fields Before Relying on an Oshkosh Record

Parcel Match the exact parcel.
Address Confirm physical location.
Owner Check current record.
Assessment Year Use 2026 when needed.
Property Facts Check size and condition.
Tax Year Separate roll from bill.
Owner-name warning: If a deed was recently recorded but the Assessor still shows the former owner, verify the recorded conveyance through the Winnebago County Register of Deeds before treating the Assessor’s owner field as a title opinion.

Oshkosh Property Assessment Record Decoder

Field / concept What it means What to do with it
Assessed Value Value assigned by the municipal assessor for property-tax purposes. Use this when reviewing the assessment and calculating the tax-rate effect.
Market Value Expected price in an arm’s-length sale between informed parties under normal conditions. Compare recent similar sales when deciding whether the assessment is supportable.
Land Value Assessment attributed to the land. Compare lot size, location and land characteristics.
Improvement Value Assessment attributable to buildings and improvements. Check square footage, quality, age, remodeling and garage/basement data.
Tax Levy Amount each taxing jurisdiction needs to raise. Do not confuse a levy increase with an Assessor-generated increase.
Tax Rate / Mill Rate Tax levy divided by the taxable assessment base. Use the bill-year rate after budgets and levies are finalized.
Special Assessment / Charge A separate charge can appear on a property-tax bill. Do not attribute the entire bill increase to assessed value.
Lottery & Gaming Credit Wisconsin credit for qualifying primary residences. Verify whether the credit appears on the bill and apply if eligible.
Assessment is only one part of the bill

How an Oshkosh Assessment Becomes a Property Tax

1. January 1 Property Wisconsin assessment is based on property as of the assessment date.
2. Assessor Value Oshkosh determines the taxable assessed value using market information and property data.
3. Final Assessment Roll Open Book and Board of Review conclude before the assessment roll is finalized.
4. Levies / Tax Rate City, county, school and technical-college budgets contribute to the tax rate.
5. Tax Bill Credits, special charges and other bill-specific items produce the final amount.
Oshkosh’s four major taxing jurisdictions: the City of Oshkosh, Winnebago County, Oshkosh Area School District and Fox Valley Technical College each contribute to the overall property-tax calculation.
“My taxes went up” is not proof the assessment is wrong. Oshkosh explains that levy changes, referenda, special assessments, delinquent charges or utility-related amounts can affect the bill independently of the Assessor’s value.
2026 Board of Review has concluded

Oshkosh Open Book & Board of Review Appeal Process

Changed Assessment Wisconsin requires notice when the total assessment changes from the prior year.
Informal Review Review the record with Assessor staff and identify factual or market-evidence issues.
Notice of Intent A property owner normally must give the Board clerk notice of intent to object at least 48 hours before the first scheduled Board meeting.
2026 Board of Review Oshkosh’s Board met May 21, 2026 and finalized the assessment roll.
Further Review Any post-BOR route depends on the procedure used and the date you received the Board’s determination.

Evidence Oshkosh says is useful

  • Recent comparable sales
  • Your opinion of market value
  • Independent appraisal
  • Correct square footage
  • Condition evidence
  • Bathroom / basement data
  • Garage or improvement facts
  • Sale information
August 2026: You cannot wait for the December tax bill and then begin an ordinary 2026 assessment objection. Oshkosh explicitly warns that by the time the tax bill is issued, the assessment objection period has already ended.
If you already went through Board of Review: Wisconsin provides specific judicial or administrative review routes with short deadlines. Use the date on your Board determination and the procedure you followed; do not calculate a deadline from this article.
“I am calling regarding Oshkosh parcel __________. The 2026 Board of Review has concluded. I participated / did not participate, and my issue is __________. Please confirm whether this is a property-record correction or whether I need to review the post-Board appeal procedures tied to my determination notice.”
Wisconsin Board of Review Guidance Use the Department of Revenue procedures and forms when a formal assessment appeal matters.
Mailing address is different from ownership

How to Correct an Oshkosh Owner or Mailing Address

Mailing address change The City Assessor provides an online Mailing Address Change Request for property owners.
Owner name change The City says ownership names cannot be changed merely by sending an address-change request. A conveyance document must first be recorded with the Winnebago County Register of Deeds.
Determine whether the problem is mailing or ownership. A wrong mailing destination is not the same as an outdated legal owner.
For mailing only, use the Assessor change form. Open Mailing Address Change Request.
For ownership, verify the deed. Search the Winnebago County Register of Deeds to confirm that the conveyance was actually recorded.
Then contact the Assessor if ownership has not updated. Provide the recorded-document information so staff can identify the transfer.
Utility bills use a separate mailing list. The Assessor’s mailing-address change does not automatically change the City’s utility-account mailing address. Utility Accounting currently lists 920-232-5325.
Two different “2026” timelines

Understand the Oshkosh Assessment Year vs Payment Year

2026 Assessment Date Property assessment work is tied to the property’s status at the beginning of the assessment year.
2026 Roll Finalized Board of Review concluded and the current assessment roll became final.
Current Position Final 2026 assessment exists, but the year-end 2026 property-tax bill has not yet been issued.
2026 Bills Issued Wisconsin’s 2026 property-tax bill schedule requires bills to be issued by the third Monday in December—December 21, 2026.
2026 Bill Payments The 2026 tax bill then follows the Oshkosh January, March, May and July installment structure in 2027.
For someone searching in August 2026: use the 2026 assessment roll to research value, but use the existing real-estate tax portal for already-issued bills and payment history.
Four-installment real-estate option

Oshkosh Real Estate Tax Installment Schedule

The City Finance page states that real-estate taxes can be paid in full by January 31 or in four installments.

January 31 Full payment deadline or first installment.
March 31 Second real-estate installment.
May 31 Third real-estate installment.
July 31 Fourth and final City installment before delinquent real-estate tax is handed to Winnebago County.
Miss one installment? Oshkosh states that if an installment is not fully paid by its applicable due date, the unpaid principal is subject to 1% monthly interest calculated from February, and additional statutory penalty can apply.
Do not rely on a USPS postmark for ordinary City payment timing. Oshkosh’s tax FAQ states payments are posted when received under the City’s ordinance and Wisconsin law.
Current online real-estate tax payment fees

Oshkosh Property Tax Online Payment Fees

Real Estate eCheck FREE Current City online bill-pay page lists ACH/EFT eCheck for real-estate tax payments at no fee.
Credit / Debit 2.75% Current fee with a $1.95 minimum.
Card Maximum $10,000 Maximum real-estate tax / utility card transaction including fee.
eCheck Maximum $125,000 Maximum ACH/EFT transaction including applicable amount.
24/7 phone payment: Oshkosh’s current InvoiceCloud service lists automated real-estate tax / utility payment and balance access at 888-412-1013.
Returned electronic payment: The City’s current online payment page lists a $35 fee for a failed eCheck or credit-card chargeback.
Verify Live Oshkosh Payment Fees Review the current payment page before authorizing the transaction because processor terms can change.
Current August routing

After July 31: Delinquent Oshkosh Real Estate Taxes Move to Winnebago County

City installments end Oshkosh’s fourth installment is due July 31.
August settlement Unpaid real-estate taxes are submitted to Winnebago County for final collection as part of the August tax settlement.
Search County payoff Winnebago County’s property information site includes City of Oshkosh parcels when they have a delinquent tax balance.
Pay County Treasurer Use the current county payoff rather than an outdated City installment figure.
August 12, 2026: If you are trying to resolve an unpaid 2025 real-estate tax bill after missing the July 31 final city installment, check Winnebago County now rather than repeatedly trying to calculate the delinquency from the original City bill.
County search behavior: Winnebago County explicitly says City of Oshkosh parcels are normally absent from its current property search unless the parcel carries a delinquent tax balance.
Search Winnebago County Delinquent Property Tax Open current-year ownership/current-payoff information and use the county balance once the delinquency has transferred.
Primary-residence credit

Wisconsin Lottery & Gaming Credit for an Oshkosh Home

Wisconsin’s Lottery and Gaming Credit can reduce the property-tax bill for a qualifying owner-occupied primary residence. It is not based on income.

Primary residence The property must satisfy Wisconsin’s eligibility rules for the applicable January 1 qualification date.
Only one primary residence The credit is not intended for every investment property, vacation home or rental owned by the same taxpayer.
Check the bill Verify that the credit actually appears rather than assuming it was carried forward automatically after a purchase.
2026 application: Wisconsin DOR has a 2026 Lottery and Gaming Credit application process for owners who qualify as of January 1, 2026.
Open Wisconsin Lottery & Gaming Credit Forms Use the DOR online application portal to determine the correct current form and filing route.
Major Wisconsin law change

Why Current Oshkosh Personal Property Tax Works Differently After 2024

Wisconsin made a major statewide change beginning January 1, 2024: most personal property became exempt from general property taxation under 2023 Wisconsin Act 12.

General personal property exemption Most locally assessed and manufacturing personal property is no longer taxed as personal property beginning in 2024.
Real property is different Buildings, improvements or fixtures that are legally treated as real estate remain part of the real-property assessment system.
Historical bills still exist Oshkosh retains personal-property tax lookup/payment tools for older tax years and legacy obligations.
Do not use an old Oshkosh personal-property tax article as proof that a 2026 business asset is taxable. Confirm current classification with the Assessor because the statewide exemption substantially changed the rules.
Review Wisconsin Personal Property Exemption Check current exceptions and the distinction between exempt personal property and property assessed as real estate.
Parcel + zoning + permit context

Use Oshkosh GIS & Property Files to Check More Than Assessed Value

City GIS Use the map for approximate property, boundary and other geographic context.
Inspection property files Oshkosh publishes electronic property files with permits, cases and projects.
Pre-1997 records The City is still scanning older property documents and says users should contact Inspection Services if a pre-1997 file appears incomplete.
Search the Assessor parcel first. Save the parcel and street address.
Open City GIS. Use Oshkosh GIS / Online Maps.
Compare parcel geography and surrounding property. Use the map to orient yourself—not to make a legal survey conclusion.
Check permit/project history. Open Inspection Services Records for permits, cases and projects.
Call when old scans appear incomplete. Inspection Services currently lists 920-236-5048 for help with pre-1997 records.
GIS is not a survey. Oshkosh expressly states its GIS is for informational/illustrative purposes and may not be sufficient for legal, engineering or surveying use.
Winnebago County Register of Deeds

How to Search Oshkosh Deeds, Mortgages, Liens & Plats

Recorded Oshkosh land documents are maintained at the Winnebago County Register of Deeds, not at the City Assessor’s Office.

Collect parcel and owner information first. Use the City Assessor record to identify the parcel, street address and likely owner.
Open Winnebago County Land Records. Start with Search Land Records.
Choose the right search route. Winnebago County offers in-office public terminals plus Tapestry for occasional professional users and Laredo for frequent local real-estate professionals.
Search deeds and later instruments. Follow ownership conveyances, mortgages, satisfactions, assignments, land contracts, federal tax liens, plats and certified survey maps as relevant.
Match the legal property. Do not rely only on a same-name search. Compare parcel/legal-description information.
Use the actual recorded document. An Assessor owner field is not a substitute for reviewing the instrument when title matters.
Historical depth: Winnebago County says most in-office real-estate records are available back to 1850, with indexes available back to 1935.
Register contact: Susan Snyder, Register of Deeds, 112 Otter Avenue, Room 108, Oshkosh, WI 54901; 920-232-3390.
County ownership and parcel maintenance

When to Contact the Winnebago County Real Property Lister

The Real Property Lister works behind the scenes with parcel descriptions, owner names, property addresses and assessment/tax-roll data.

Parcel numbers The office issues and maintains parcel numbers and legal-description information.
Ownership flow The Lister updates owner names based on recorded information from the Register of Deeds.
Assessment / tax-roll coordination The office processes assessor valuation changes, Board of Review changes, mill rates, levies and tax-roll information.
Current contact: Winnebago County Real Property Lister, 112 Otter Avenue, Room 109, Oshkosh, WI 54901; 920-232-3346.

Oshkosh Property Research by Situation

Situation Records to review Best next action
Buying an Oshkosh home Assessor record, 2026 roll, GIS, permits, current tax bill and recorded deed/mortgage. Match parcel across City and County systems before relying on listing-site data.
2026 assessment seems high Final assessment, sales, property characteristics and any BOR documentation. Determine whether this is a factual correction or a post-BOR legal review issue.
Unpaid 2025 tax in August 2026 City bill image and Winnebago County current payoff. Use County Treasurer after the July 31 City handoff.
Need the 2026 tax bill 2026 final assessment now; year-end tax bill later. Do not mistake the assessment roll for the December 2026 bill.
Recently bought the property Recorded deed, Assessor owner record and prior tax-bill image. Expect older tax bills to remain in the prior owner’s name when appropriate.
Boundary question City GIS, deed, plat/CSM and professional survey. Do not treat GIS as legal survey evidence.
Primary residence credit missing Tax bill and Wisconsin Lottery/Gaming Credit eligibility. Use the current DOR application route.
Business asking about personal property tax Current Wisconsin Act 12 exemption rules and property classification. Do not apply pre-2024 personal-property rules to 2026 automatically.
Problem solver

Oshkosh Property Search Problems & Fixes

Problem What to try Correct office / system
Searching “Oshkosh County” Use City of Oshkosh for assessment/current city tax and Winnebago County for county functions. City + County
Cannot find current Oshkosh parcel on county site Use City search. County says Oshkosh city properties appear there when they have a delinquent tax balance. City Assessor
Tax address search fails Use house number and partial street name; omit street suffix. City tax search
Parcel-number search fails Use all 10 digits with no dashes. City tax search
Installment amount looks wrong Open “View bill image.” The City currently reports a known display issue. City Finance
Bill image balance differs Remember the City warns the image shows accurate balance only if payments are current. City Finance
July 31 installment was missed Check Winnebago County Treasurer for the current delinquent payoff. County Treasurer
Need to challenge value after May Board of Review is finished. Check your BOR participation/determination and Wisconsin post-BOR procedures. Assessor / Clerk / DOR
Owner name has not updated Verify that the deed was recorded with Winnebago County first. Register → Assessor
Mailing address is wrong Submit the City Assessor’s online address-change request. Assessor
Need old permit records Use electronic property files and call Inspection Services for incomplete pre-1997 scans. Inspection Services
Map boundary looks wrong Use recorded documents and a surveyor rather than relying on City GIS. Register / Surveyor
“I am researching City of Oshkosh parcel __________ at __________. The Assessor / tax portal / Winnebago County record shows __________, but my deed or bill shows __________. Please confirm which office owns the correction and what document I should provide.”

Oshkosh Property Assessment, Tax & Land Records Contacts

City Assessor Dean Peters
City Hall
215 Church Avenue
Oshkosh, WI 54901
Mailing: PO Box 1130
920-236-5070
assessor@oshkoshwi.gov
City Tax Collections City of Oshkosh Finance
215 Church Avenue
Oshkosh, WI 54901
920-236-5025
tax@oshkoshwi.gov
Winnebago County Treasurer Amber L. Hoppa
112 Otter Avenue
Room 116
Oshkosh, WI 54901
920-232-3420
Register of Deeds Susan Snyder
112 Otter Avenue
Room 108
Oshkosh, WI 54901
920-232-3390
Real Property Lister 112 Otter Avenue
Room 109
Oshkosh, WI 54901
920-232-3346
Published hours City Hall: Monday–Friday
8:00 a.m.–4:30 p.m.

County Treasurer / Register:
Monday–Friday, 8:00 a.m.–4:30 p.m.
Two nearby record centers: City Hall at 215 Church Avenue handles the Oshkosh assessment and city tax workflow, while several Winnebago County property offices are at 112 Otter Avenue.
Official live-action routes

Oshkosh Property Search Final Action Center

Use the city system for current Oshkosh assessment/tax work and the county system for transferred delinquency and recorded land documents.

Assessor Property Search Research City of Oshkosh property and assessment information. City Tax Search Address, 10-digit parcel ID, bill number, bill image and payment. County Delinquent Tax Current payoff information after Oshkosh delinquency transfers. Deeds & Land Records Tapestry, Laredo and in-office Winnebago real-estate records.
Title-specific answers

Oshkosh Property Assessor Search & Tax Records FAQs

1. Is there an Oshkosh County Property Assessor?

No. Oshkosh is a city in Winnebago County, Wisconsin. Property assessments inside the City of Oshkosh are handled by the City of Oshkosh Assessor’s Office. Winnebago County handles county functions such as delinquent city tax collection after the municipal collection period, the Register of Deeds and Real Property Lister.

2. How do I search Oshkosh Wisconsin property records?

Use the official City of Oshkosh Assessor Property Search. Verify the parcel, physical address, owner, assessment year and property characteristics. The City also publishes a separate 2026 Final Assessment Roll by Parcel for owners who need the finalized current-year assessment.

3. Is the City of Oshkosh 2026 assessment roll final?

Yes. The City states that the Board of Review met on May 21, 2026 and finalized the assessment roll. The Assessor’s website now lists the 2026 Final Assessment Roll By Parcel.

4. Can I still appeal my Oshkosh 2026 property assessment in August?

The normal Open Book and Board of Review process has concluded. Owners who already participated in Board of Review may have specific post-Board review rights with deadlines tied to the procedure used and the date the Board determination was received. A December tax bill is too late to begin the ordinary assessment objection process.

5. How do I search an Oshkosh real-estate tax bill?

Use the City of Oshkosh Real Estate Property Tax search. You can search by address, a 10-digit parcel ID entered without dashes, or bill number. For an address search, enter the house number and partial street name; a street suffix is not required.

6. What are the Oshkosh property-tax installment dates?

City Finance states that real-estate taxes can be paid in full by January 31 or in four installments due January 31, March 31, May 31 and July 31. Real-estate taxes remaining unpaid after July 31 are submitted to Winnebago County for final collection during the August tax settlement.

7. What are Oshkosh’s current online real-estate tax payment fees?

The City’s current online bill-pay page lists real-estate tax ACH/EFT eCheck payments as free. Credit and debit card payments carry a 2.75% convenience fee with a $1.95 minimum. The page currently lists a $10,000 card maximum and $125,000 ACH/EFT maximum, including applicable amounts and fees.

8. Why does the Oshkosh tax portal show the wrong installment amount?

The City currently warns of a known software issue that can cause installment dollar amounts displayed on the real-estate tax search page to be incorrect. Oshkosh directs taxpayers to the “View bill image” link for the correct installment amounts. The City also notes that the bill image shows an accurate balance only when the account is current on payments.

9. Why can I not find my current Oshkosh property on Winnebago County’s tax search?

Winnebago County states that its Property Information search includes City of Oshkosh properties only when there is a delinquent tax balance. For current City of Oshkosh ownership or normal city tax information, use the City’s official property and tax systems first.

10. Where can I search Oshkosh deeds and mortgages?

Recorded Oshkosh land documents are maintained by the Winnebago County Register of Deeds. The county provides in-office public searching and online Tapestry or Laredo access. The Register’s records include deeds, land contracts, mortgages, related UCC filings, plats, certified survey maps and federal tax liens.

Official Sources & Editorial Verification

City of Oshkosh Assessor Dean Peters, 2026 Board of Review status, office contact and assessment resources. 2026 Final Assessment Roll Current final roll by parcel and prior-year assessment-roll comparisons. Real Estate Tax Search Address, parcel ID, bill number, bill-image and current installment-warning information. City Finance Installment schedule, interest, city-to-county handoff and tax-collection contact information. Online Bill Pay Current real-estate eCheck, credit/debit fee, payment caps and phone-payment service. Winnebago County Property Information Delinquent City of Oshkosh tax search, current payoff and County Treasurer. Winnebago Land Records Register of Deeds public terminals, Tapestry and Laredo. Wisconsin Board of Review State assessment-objection procedures, forms and appeal resources. Wisconsin Personal Property Exemption Current post-2024 treatment of most personal property.
What was checked for this update: Oshkosh’s correct city/county jurisdiction, City Assessor Dean Peters, 2026 Board of Review finalization date, 2026 Final Assessment Roll, Assessor duties, tax-rate jurisdiction explanation, City real-estate search format, 10-digit parcel rule, current installment-display warning, January/March/May/July installment schedule, interest rule, post-July-31 Winnebago County collection handoff, current online eCheck/card fees, County Treasurer, Register of Deeds, Real Property Lister, GIS disclaimer, permit-record availability, Wisconsin Board of Review procedures, 2026 bill-issuance timeline, Lottery and Gaming Credit and Wisconsin’s personal-property tax exemption.

CountyPropertyAppraiser.org is an independent informational website. It is not affiliated with the City of Oshkosh, City Assessor, City Finance Department, Winnebago County, Wisconsin Department of Revenue, Winnebago County Treasurer, Register of Deeds, Tapestry, Laredo, InvoiceCloud or any Oshkosh taxing jurisdiction.

Assessments, tax rates, online payment fees, installment-display behavior, Board of Review procedures, delinquent tax balances, credits, officeholders, municipal boundaries and Wisconsin law can change. Verify time-sensitive information with the responsible official office before paying a tax bill, filing an appeal, relying on ownership information or making a legal or financial decision.

Editorial verification date: August 12, 2026.

Slug: oshkosh-property-assessor

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Value term Simple meaning
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