City of Oshkosh Wisconsin Property Records 2026
Oshkosh WI Property Assessment Search, 2026 Final Roll, Tax Bills & Land Records
If you searched for a City of Oshkosh property assessor, the correct office is the City of Oshkosh Assessor’s Office. Oshkosh is a city in Winnebago County, Wisconsin; it does not have a separate “Oshkosh County” assessor.
The city’s online property system is unusually useful because it can search current owners, property locations and parcel numbers and also provides advanced sale searches, assessment history, zoning, acreage, tax classification, assigned districts, legal descriptions, building characteristics and recorded-document references. The 2026 assessment roll was finalized after the Board of Review met on May 21, 2026.
Search owner, address or parcel number
Review finalized January 1, 2026 assessment data
Find sale and recorded-document references
Connect City taxes with Winnebago County deeds
City Assessor
Dean Peters
Assessor phone
920-236-5070
Assessor email
assessor@oshkoshwi.gov
2026 roll status
Finalized May 21
Editorial review
August 12, 2026
The 2026 City of Oshkosh Assessment Roll Is Final
The City of Oshkosh Board of Review met on May 21, 2026 and finalized the 2026 assessment roll. The city now publishes the 2026 Final Assessment Roll by parcel, and live parcel records identify themselves as assessment records as of January 1, 2026.
2026 parcel records are live
Search current owner, address, parcel, assessment history, sale data and building details online.
2026 final roll is posted
The Assessor’s Property Assessments page currently lists the 2026 Final Assessment Roll by parcel.
Normal appeal season has passed
Open Book and the regular Board of Review process occurred before the roll was finalized.
2026 tax bill comes later
Wisconsin’s current tax-bill calendar requires 2026 property tax bills to be issued by December 21, 2026.
Current tax search still helps
Use the City’s real estate tax system for existing bills and payment history while waiting for the new 2026 bill.
County lookup has an Oshkosh limitation
Winnebago County says current City of Oshkosh parcels generally appear in its county tax search only when there is a delinquent tax balance.
Do not wait for the December tax bill to challenge an ordinary assessment. The City specifically warns that when the tax bill arrives, the normal assessment-objection period has already ended.
City Assessor vs City Tax Collection vs Winnebago County Register of Deeds
City of Oshkosh Assessor
- Property assessment
- Current owner record
- Parcel number
- Land and building value
- Assessment history
- Property characteristics
- Sale analysis
- Tax classification
- Mailing-address changes
- Open Book / assessment questions
City Finance / Tax Collection
- Real estate tax bill
- Payment balance
- Installments
- Tax receipts
- Online payment
- Delinquent interest
- Lottery credit processing
- Tax billing questions
Winnebago Register of Deeds
- Warranty deeds
- Quit claim deeds
- Land contracts
- Mortgages
- Satisfactions
- Assignments
- Plats and surveys
- Recorded land records
Where does Winnebago County Real Property Lister fit? The county Lister maintains parcel numbers, ownership descriptions, owner names as recorded by the Register of Deeds, taxing districts, legal-description information and the flow of assessment/tax information between the city and county.
The Assessor does not set the tax rate or collect your tax bill. Oshkosh property taxes combine levies from the City of Oshkosh, Winnebago County, Oshkosh Area School District and Fox Valley Technical College, plus other bill-specific items when applicable.
Choose the Oshkosh Property Record You Need
Find a property
Search by current owner name, address, parcel ID or advanced parcel filters.
Review 2026 assessment
Compare land, building, total assessed value and historical values.
Research a sale
Search seller, buyer, sale price, sale date and instrument number.
Check real estate tax
Search the City tax account by address, 10-digit parcel ID or bill number.
Find a deed
Use instrument and ownership clues with Winnebago County Register of Deeds.
Review permits / property file
Use Inspection Services for permit, case and project records associated with the address.
Jump to Your Oshkosh Property Task
How to Search City of Oshkosh Property Records
Open the official City-linked property portal.
Go to City of Oshkosh Assessor Records Search.
Use the main Parcel Records search box.
Start typing a parcel ID, current owner name or property location.
Select the matching result.
Do not rely only on the owner name; verify the physical location and parcel number.
Check Parcel Summary.
Confirm property location, PAD type code, zoning and acreage.
Review Assigned Districts.
Typical Oshkosh city parcels can show City of Oshkosh, Winnebago County, Oshkosh School District, Fox Valley Technical College, ward and any applicable TID.
Read the Legal Description.
Use this as a property-record clue, but rely on the recorded instrument or survey when legal proof is needed.
Open Assessed Value History.
Compare 2026 with earlier years for land value, building value and total value.
Check Document / Transfer / Sales History.
Copy the instrument number, sale date, deed type and grantor/grantee information for land-record research.
Use the built-in Real Estate Tax or GIS link for the next task.
Assessment value, tax payment and legal land records answer different questions.
Search Oshkosh by Owner, Address, Parcel, Subdivision or Sale
Current Owner
Enter an owner name to find parcels currently associated with that assessment record.
Property Location
Filter by street-number range, street name and city.
Parcel Number
Search a partial parcel number, exact number or parcel-number range.
Subdivision / Neighborhood
Useful when researching comparable parcels in the same development or assessment neighborhood.
Property Use
Filter properties by the use codes available in the Assessor database.
Square Footage
Advanced Search offers residential and commercial square-footage ranges.
Acreage
Filter parcels using an acreage range.
Construction Year
Search by original construction-year range.
Tax District
Filter by the taxing district information recorded in the database.
Sale Records
Switch from Find Parcels to Find Sales for seller, buyer and transaction research.
Verify These Six Fields Before Using an Oshkosh Property Record
Owner
Current record
Location
Physical address
Parcel
Exact ID
2026 value
Land + building
Legal description
Parcel clue
Instrument
Deed / transfer clue
City of Oshkosh Property Record Decoder
PAD Type Code
Describes the Assessor’s property type, such as a residential style, vacant-land category or other assessment use.
Zoning
The parcel page displays a zoning code, but the City warns that zoning should be verified with Community Development.
Acreage
Parcel acreage maintained in the Assessor database.
Assigned Districts
Can include the City, Winnebago County, school district, Fox Valley Technical College, ward and Tax Incremental District.
Legal Description
Abbreviated legal-description information used for assessment identification.
Land Value
The portion of the property’s assessed value assigned to land.
Building Value
The assessed value attributable to buildings and taxable improvements.
Total Value
Land plus building assessment for the assessment year.
Estimated Fair Market Value
A value estimate related to the assessment/equalization information in the system; do not confuse it automatically with assessed value.
Sale History
Can show instrument number, sale date, deed type, sale validation, sale amount, grantor and grantee.
Building Information
Property records can include building characteristics used in mass appraisal.
Land Lines
Can identify tax classification, acreage, square feet, width, depth and land value.
Important disclaimer from the Assessor portal: summary parcel data may not be a complete representation of the parcel or its improvements. Building/unit information should be verified with the appropriate City department, and zoning should be confirmed with Community Development.
How the 2026 Oshkosh Assessment Roll Reached Final Status
Assessment date
Wisconsin property is assessed based on its status as of January 1.
Assessment review
Assessor staff review sales, permits, property data and changes affecting the annual roll.
Informal review
Owners can discuss values and factual property data with Assessor staff.
Board of Review
Oshkosh’s Board of Review met May 21, 2026 at 9:00 a.m.
2026 roll finalized
The City now publishes the 2026 Final Assessment Roll by parcel.
Need the official citywide roll rather than a single property page? Open the City’s Property Assessments page and choose 2026 Final Assessment Roll By Parcel.
2026 Final Assessment Roll
Open the City page → choose the current-year 2026 roll → locate the parcel → compare it with the live Assessor property record.
How Oshkosh Property Assessments Are Determined
Property Data
Assessor staff maintain details about land, buildings, size, condition, quality and other characteristics.
Market Evidence
Recent property sales help staff analyze how buyers are valuing comparable properties.
Other Valuation Approaches
Cost and income information may also be relevant depending on property type.
Assessed Value
Wisconsin requires municipal assessments to be based on fair-market or true-cash-value principles.
Maintenance can preserve value
Ordinary repairs such as roof repair, painting or furnace replacement do not automatically produce a separate assessment increase by themselves.
Improvements can affect value
Added rooms, garages, kitchen/bath modernization, central air, fireplaces and extensive remodeling can increase market value.
Neighborhood markets differ
Similar-looking properties can have different assessments because of interior features, condition, quality, size or market demand.
Assessment vs tax: the Assessor establishes property value. Property tax is calculated later after taxing jurisdictions set their levies and the applicable mill rate is determined.
Search Oshkosh Property Sales Before Questioning an Assessment
The Assessor portal has a dedicated advanced sale search that is much more useful than checking random real-estate listings when you are trying to understand an assessment.
Seller Name
Search a prior owner or seller involved in a transfer.
Buyer Name
Search the purchaser/grantee associated with recorded sale data.
Sale Price
Use minimum and maximum sale-price filters to narrow comparables.
Sale Date
Search a transaction-date range rather than mixing old and new market periods.
Vacant or Improved
Separate vacant-land transactions from developed-property sales.
Instrument Number
Search an exact recorded instrument when you already have the document reference.
Comparable-sale tip: location, property style, age, square footage, condition and use usually matter more than simply finding the closest sale price.
Oshkosh Assessment Appeals: Open Book and Board of Review
Review Property Record
Check land, building details, condition, use and recent comparable sales.
Open Book
Discuss the assessment informally with the Assessor while the roll is open.
Board of Review
File the required objection and present evidence when informal review does not resolve the dispute.
Further Appeal
If you received a Board determination, follow the appeal rights and deadline stated in that written determination.
Current August 2026 position: Oshkosh’s Board of Review met May 21 and finalized the 2026 roll. The normal 2026 Open Book / Board of Review objection route is therefore no longer the ordinary option for someone first discovering a valuation complaint now.
For future assessment years: Oshkosh says owners must contact the City Clerk at least 48 hours before Board of Review to begin the standard objection process and complete the required objection form.
City Assessor
920-236-5070
assessor@oshkoshwi.gov
assessor@oshkoshwi.gov
Evidence that addresses value
- Current Assessor property record
- Assessment-change notice
- Recent comparable sales
- Recent appraisal
- Correct living area
- Correct building condition
- Correct acreage
- Photos of major defects
- Repair estimates
- Income/expense data for applicable property
“I am reviewing City of Oshkosh parcel __________ at __________. The 2026 Assessor record shows land value __________, building value __________ and total assessment __________. I believe the property data or value is incorrect because __________. Please tell me whether this is a correctable record issue or whether I need to follow an assessment-appeal procedure for the next available assessment year.”
How to Search City of Oshkosh Real Estate Taxes
Find the parcel in the Assessor system first.
Save the property location and parcel number.
Open the City’s Real Estate Tax search.
Go to City of Oshkosh Real Estate Property Taxes.
Search with one method.
Use property address, 10-digit parcel ID or bill number.
For address searches, keep it simple.
Enter the house number and partial street name; street suffixes are not required.
Enter parcel ID without dashes.
The current tax search expects a 10-digit parcel number.
Open the tax bill image.
Verify the taxpayer, parcel, tax year, credits and installments before paying.
Use Online Bill Pay only after confirming the bill.
Current real-estate-tax eCheck payments are free; credit/debit payments carry the City’s current processing fee.
Save the receipt.
Keep confirmation for escrow, closing, tax preparation and future payment disputes.
Current City system warning: Oshkosh reports a known issue that can cause installment dollar amounts displayed on the search page to be incorrect. For installment amounts, use the View bill image link. The City also notes that the bill image displays an accurate balance only when the account is current on payments.
Real Estate Tax eCheck
Current online tax eCheck fee: FREE.
Credit / Debit Card
Current real-estate-tax fee: 2.75% with a $1.95 minimum.
Phone Payment
Current automated payment line: 888-412-1013.
Oshkosh Property Tax Estimator
The basic Wisconsin calculation is assessed value multiplied by the tax rate per $1,000. This worksheet also lets you subtract estimated credits and add special charges. It starts blank so an old mill rate cannot be mistaken for the still-developing 2026 rate.
$0.00
Gross estimated tax
$0.00
After entered credits
$0.00
After entered charges
Do not use the 2025 mill rate as if it were the final 2026 rate. The 2026 tax bill will reflect levies, rates, credits and charges established later in the 2026 tax-bill cycle.
Oshkosh Real Estate Tax Installment Schedule
The City allows real estate taxes to be paid in full by January 31 or through four installments. For the 2026 tax bill issued in December 2026, those recurring installment dates fall in 2027.
2026 bill issued
Wisconsin’s current calendar requires 2026 property-tax bills to be issued by December 21, 2026.
First installment / full payment
Pay in full or make the first installment under the City’s annual schedule.
Second installment
Second City installment deadline.
Third installment
Third City installment deadline.
Fourth installment
Final City installment; unpaid real estate taxes transfer to Winnebago County after July 31.
Five-business-day grace: the City publishes a five-business-day grace framework for real-estate-tax installments. Confirm the first date late on the current bill rather than copying a prior year’s calendar.
Late installment consequence: if an installment is not fully paid on time, the City states that the unpaid principal balance is charged 1% monthly interest calculated from February, subject to the applicable Wisconsin tax rules.
Lottery, First Dollar and School Levy Tax Credits
Lottery and Gaming Credit
Generally available when a Wisconsin resident owns the dwelling and uses it as a primary residence on January 1 of the year in which the taxes are levied.
First Dollar Credit
Wisconsin DOR states that parcels with a qualifying real-property improvement can receive the First Dollar Credit.
School Levy Tax Credit
Wisconsin DOR states that taxable real property qualifies for the School Levy Tax Credit, which is reflected on the tax bill.
Missing Lottery Credit? Oshkosh says an eligible owner can submit the current-year Lottery Credit application to the City by January 31 after receiving the bill. A late claim after that date generally goes to the Wisconsin Department of Revenue under its late-claim process.
Primary residence matters: the Lottery and Gaming Credit is not for ordinary rental property, vacant land, garages or other property that is not the owner’s qualifying primary residence.
Wisconsin Lottery and Gaming Credit
Review eligibility → check your tax bill for the credit line → submit the correct claim or removal form when your property’s status requires it.
Why Winnebago County Property Search May Not Show an Oshkosh Parcel
Winnebago County explicitly says its Property Information search will only include City of Oshkosh properties when there is a delinquent tax balance. For current ownership information on an ordinary City of Oshkosh parcel, start with the City’s Assessor website.
Current Oshkosh assessment
Use the City of Oshkosh Assessor portal.
Current City tax account
Use City of Oshkosh Real Estate Tax search.
Delinquent city taxes after transfer
Winnebago County becomes important after the City’s July 31 collection period.
No county result does not mean the property does not exist. If a current Oshkosh parcel is missing from Winnebago County’s tax lookup, return to City resources before assuming the owner, parcel or tax record is invalid.
Winnebago County Property Information
Use this for county-side property/payoff research and delinquent-tax context; use City of Oshkosh systems first for ordinary current city parcels.
How to Find an Oshkosh Deed, Mortgage, Plat or Land Contract
Open the City Assessor property record.
Verify owner, parcel number, legal description and sale history.
Copy the recorded instrument number.
Oshkosh sale history can display instrument number, sale date, deed type, grantor and grantee.
Open Winnebago County Search Land Records.
Go to Winnebago County Land Records Search.
Choose the search service that matches your use.
Winnebago County offers Tapestry for occasional users and Laredo for frequent professional land-record users.
Search the owner/grantor/grantee carefully.
Tapestry’s county guidance recommends correct last-name spelling and allows a shortened first name.
Order or inspect the recorded instrument when legal proof matters.
Do not substitute an Assessor property page for the actual deed, land contract, mortgage or satisfaction.
Property Fraud Alert: Winnebago County Register of Deeds provides a free property-fraud alert service for owners who want notification when potentially relevant real-estate documents are recorded.
Oshkosh Building Permits, Cases and Property Files
For renovation history, code cases and permit/project records, use City Inspection Services instead of relying only on the Assessor’s building summary.
1997–Present
Electronic online property files are available for permits, cases and projects from 1997 forward.
Before 1997
The City is still scanning older documents and advises contacting Inspection Services when an older file may be incomplete online.
Inspection Records Help
Call 920-236-5048 when you need to confirm whether older records have been scanned.
Assessor building data is not a permit approval. A building or unit count shown on an assessment record should be verified with the appropriate City department when permitting, occupancy or code compliance matters.
Open Oshkosh Property Files
Choose the applicable pre-1997 or 1997-present property-file route → search the address → compare permits/cases with the Assessor record.
Buying Property in Oshkosh? Compare These Records
- Current owner
- Physical address
- Parcel number
- Legal description
- 2026 land value
- 2026 building value
- Total assessment
- Tax classification
- Assigned districts
- TID when applicable
- Recent sale price
- Recorded instrument number
- Current City tax balance
- Lottery credit status
- Permit / project history
- Recorded deed or land contract
Three-record rule: for a purchase, refinance or ownership dispute, compare the City Assessor record, City tax account and Winnebago County recorded document instead of treating one database as a complete property history.
Oshkosh Property Search Problems and Fixes
| Problem | What to do | Correct office / system |
|---|---|---|
| Only know the owner’s name | Use the Assessor portal’s Current Owner search. | City Assessor |
| Address gives too many results | Use Advanced Search with street number, street name, city or neighborhood filters. | City Assessor |
| Need the official 2026 roll | Use the City Property Assessments page and open the 2026 Final Assessment Roll by parcel. | City Assessor |
| Need comparable sales | Use Advanced Search → Find Sales and filter by price, date, buyer, seller or property characteristics. | City Assessor |
| Need exact tax due | Use the City’s Real Estate Tax search rather than calculating from the assessment page. | City Finance |
| Installment display looks wrong | Use the View bill image link because the City currently warns of an installment-display issue. | City Finance |
| Winnebago County search has no Oshkosh result | Return to City systems; county says ordinary current Oshkosh parcels may not appear unless delinquent. | City Assessor / Finance |
| Need a deed or mortgage | Copy the instrument/owner clues from Assessor sale history and search Register of Deeds. | Winnebago ROD |
| Need exact zoning confirmation | Use the parcel zoning code as a clue, then verify with City Community Development. | Community Development |
| Building data seems wrong | Compare Assessor information with City permit/property files and contact the appropriate City office. | Assessor + Inspection |
| Discovered assessment issue after May 21 | Contact the Assessor to determine whether it is a factual-record correction or an issue that requires a future/statutory appeal route. | City Assessor |
| Taxes unpaid after July 31 | Winnebago County becomes the delinquent real-estate-tax collector after the City settlement. | County Treasurer |
City of Oshkosh Assessor, Tax and Winnebago County Contacts
City of Oshkosh Assessor
City Assessor: Dean Peters
215 Church Avenue
P.O. Box 1130
Oshkosh, WI 54903-1130
920-236-5070
assessor@oshkoshwi.gov
Monday–Friday
8:00 a.m.–4:30 p.m.
215 Church Avenue
P.O. Box 1130
Oshkosh, WI 54903-1130
920-236-5070
assessor@oshkoshwi.gov
Monday–Friday
8:00 a.m.–4:30 p.m.
City Tax Collections
City of Oshkosh Finance
215 Church Avenue
Oshkosh, WI 54901
Tax Collections:
920-236-5025
tax@oshkoshwi.gov
Finance / Treasurer:
920-236-5005
215 Church Avenue
Oshkosh, WI 54901
Tax Collections:
920-236-5025
tax@oshkoshwi.gov
Finance / Treasurer:
920-236-5005
Winnebago County Register of Deeds
Register: Susan Snyder
112 Otter Avenue
Room 108
Oshkosh, WI 54901
920-232-3390
Monday–Friday
8:00 a.m.–4:30 p.m.
112 Otter Avenue
Room 108
Oshkosh, WI 54901
920-232-3390
Monday–Friday
8:00 a.m.–4:30 p.m.
Winnebago County Treasurer
Treasurer: Amber L. Hoppa
112 Otter Avenue, Room 116
Oshkosh, WI 54901
920-232-3420
112 Otter Avenue, Room 116
Oshkosh, WI 54901
920-232-3420
Real Property Lister
Administrator: Liz Nichols
112 Otter Avenue, Room 109
Oshkosh, WI 54901
920-232-3346
112 Otter Avenue, Room 109
Oshkosh, WI 54901
920-232-3346
Oshkosh Property Records Action Center
Use the City for current assessment and City tax records. Use Winnebago County for recorded deeds and county-side delinquent tax information.
Assessor Property Search
Owner, address, parcel, assessment history, sales and property data.
2026 Final Roll
Open the finalized City assessment roll by parcel.
Real Estate Tax
Search bill, parcel, address, installments and payment information.
Deeds & Land Records
Search Winnebago County real-estate documents.
City of Oshkosh Property Assessor FAQs
Is there an Oshkosh County Property Assessor?
No. Oshkosh is a city in Winnebago County, Wisconsin. Property assessment for parcels inside the City of Oshkosh is handled by the City of Oshkosh Assessor’s Office, while Winnebago County handles county-level land records, real property listing and delinquent tax functions.
How do I search City of Oshkosh property records?
Use the official City of Oshkosh Assessor property portal. The main search accepts parcel ID, current owner name or property location, and Advanced Search can filter by owner, street, subdivision, neighborhood, parcel number, tax district, property use, square footage, acreage and construction year.
Who is the City of Oshkosh Assessor in 2026?
Dean Peters is the current City of Oshkosh Assessor. The Assessor’s Office phone number is 920-236-5070, the email address is assessor@oshkoshwi.gov, and City Hall is at 215 Church Avenue in Oshkosh.
Is the 2026 City of Oshkosh assessment roll final?
Yes. The City states that the Board of Review met on May 21, 2026 and finalized the assessment roll. The City’s Property Assessments page now provides the 2026 Final Assessment Roll by parcel.
Can I still appeal my 2026 Oshkosh property assessment?
The normal 2026 Open Book and Board of Review process has already occurred and the assessment roll is final. The City warns that waiting until the December tax bill is too late for the ordinary assessment objection. If you already received a Board of Review determination, follow the appeal rights and deadlines stated in that written determination.
What information appears in the Oshkosh Assessor property search?
A parcel record can show owner information, property location, parcel number, PAD type, zoning, acreage, assigned taxing districts, legal description, parcel map, assessment history, land value, building value, total value, estimated fair market value, tax classification, recorded document and sale history, building information and land-line details.
Where do I search City of Oshkosh property taxes?
Use the City of Oshkosh Real Estate Property Tax search. You can search by property address, 10-digit parcel ID without dashes or bill number. Verify the tax bill image before making a payment, especially because the City currently warns about a known installment-display issue.
When are Oshkosh real estate property taxes due?
Oshkosh allows real estate taxes to be paid in full by January 31 or in four installments due January 31, March 31, May 31 and July 31. The 2026 property tax bill is issued in December 2026, so those recurring installment dates apply during 2027 for the 2026 tax bill.
Why doesn’t Winnebago County property search always show an Oshkosh property?
Winnebago County states that its Property Information search only includes City of Oshkosh properties when there is a delinquent tax balance. For current ownership, assessment and ordinary City tax information, start with City of Oshkosh systems.
Where do I find an Oshkosh deed or mortgage?
Use the City Assessor parcel record to obtain the owner, parcel number and any instrument or sale references, then search the Winnebago County Register of Deeds. The Register records real-estate documents including deeds, land contracts, mortgages, satisfactions, assignments, plats and other authorized instruments.
Official Sources and Editorial Verification
City of Oshkosh Assessor
Dean Peters, office contact information and 2026 Board of Review status.
Official City Assessor Records Search
Current owner, property location, parcel, values, sales, districts and building information.
Advanced Parcel & Sales Search
Owner, address, subdivision, neighborhood, parcel, square-footage and sale filters.
2026 Final Assessment Roll
Current finalized assessment roll by parcel.
Assessor FAQs
Valuation methods, Open Book, Board of Review and assessment-change guidance.
Property Tax Explanation
Assessor vs tax-rate responsibilities and Wisconsin tax formula.
City Finance
Tax installments, delinquency rules, payment routing and collection information.
Real Estate Tax Search
Address, parcel and bill-number lookup plus the current installment-display warning.
Online Bill Pay
Current real-estate-tax eCheck and credit/debit payment fees.
Winnebago County Property Information
County lookup limitation for current City of Oshkosh properties and county Treasurer contact.
Real Property Lister
Parcel numbers, ownership descriptions, assessment rolls, tax rolls and taxing districts.
Winnebago Land Records
Tapestry, Laredo and Register of Deeds real-estate research.
Wisconsin Lottery Credit
Current primary-residence eligibility and claim rules.
2026 Wisconsin Tax Bill Calendar
Current 2026 property-tax-bill timeline and December 21 issuance deadline.
Verified for this August 12, 2026 update: current City Assessor Dean Peters; Assessor phone, email and office hours; 2026 Board of Review date; final 2026 assessment-roll status; live owner/address/parcel and Advanced Search fields; parcel-record contents; City tax search methods and known installment-display issue; current online real-estate-tax payment fees; recurring City installment schedule; Winnebago County’s Oshkosh search limitation; current County Treasurer Amber L. Hoppa; Register of Deeds Susan Snyder; Real Property Lister office; and Wisconsin’s December 21, 2026 tax-bill issuance deadline.
CountyPropertyAppraiser.org is an independent informational website. It is not affiliated with the City of Oshkosh, City of Oshkosh Assessor’s Office, City Finance Department, Winnebago County, Winnebago County Treasurer, Winnebago County Register of Deeds, Winnebago County Real Property Lister or Wisconsin Department of Revenue.
Property ownership, assessment values, tax rates, payment fees, credits, installment dates, delinquent balances, building details, zoning, recorded documents and office information can change. Verify time-sensitive or legal information with the responsible government office before paying taxes, filing an assessment objection, purchasing property, ordering a certified record or making a legal or financial decision.
Editorial verification date: August 12, 2026.
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