Texas • Tennessee • Illinois Property Record Router
Find the Correct Williamson County Assessor, Parcel Search and Tax Account
A search for “Williamson County property assessor” can lead to three different local systems. Georgetown and Round Rock properties normally belong to Williamson County, Texas; Franklin, Brentwood and Nolensville properties belong to Williamson County, Tennessee; and Marion, Herrin and Carterville properties belong to Williamson County, Illinois.
This 2026 guide separates appraisal or assessment records from tax bills, deeds, GIS maps, exemptions and appeals. Choose the state first, use the correct official office, match the full parcel identity and open the tax-collection portal before making a payment.
Choose Texas, Tennessee or Illinois
Match owner, address and parcel identifier
Separate values from live tax balances
Use official portals for final actions
Texas value office
Williamson CAD
Tennessee value office
Property Assessor
Illinois value office
Supervisor of Assessments
Tax records
Separate collection office
Last reviewed
August 6, 2026
Which Williamson County Property Search Should You Use?
Use the property’s physical location—not the owner’s mailing address. Choose Texas for Georgetown, Round Rock, Cedar Park, Hutto, Leander or Taylor-area property; Tennessee for Franklin, Brentwood, Nolensville, Fairview, Spring Hill or Thompson’s Station property; and Illinois for Marion, Herrin, Carterville, Johnston City or surrounding Southern Illinois property.
Wrong-state risk: A valid owner name or street address can produce a real property in another Williamson County. Match the state, nearby city, ZIP code, parcel identifier and office name before relying on a value, bill, GIS boundary or deed.
Choose the Correct Williamson County
Williamson County, Texas
Georgetown, Round Rock, Cedar Park, Hutto, Leander, Taylor and northern Austin-area property.
Open Texas search guide
Williamson County, Tennessee
Franklin, Brentwood, Nolensville, Fairview, Thompson’s Station and part of Spring Hill.
Open Tennessee search guide
Williamson County, Illinois
Marion, Herrin, Carterville, Johnston City and neighboring Southern Illinois communities.
Open Illinois search guide
Internal comparison: Florida uses a Property Appraiser and Tax Collector instead of the Texas, Tennessee or Illinois office structures explained here. See the existing Volusia County Property Appraiser guide for a practical Florida comparison.
Which Office Controls the Record You Need?
Assessment Office
- Owner and property address
- Parcel or Property ID
- Land and building values
- Property characteristics
- Exemptions or classifications
- Assessment appeals
Tax Collection Office
- Current tax statement
- Amount due and payment status
- Receipts and payment history
- Penalty and interest
- Installment or partial payments
- Online tax payment
Clerk or Recorder
- Deeds and mortgages
- Liens and releases
- Plats and easements
- Document numbers
- Certified copies
- Recorded legal instruments
GIS or Parcel Map
- Visual parcel location
- Aerial imagery
- Road and district layers
- Adjoining parcels
- Approximate boundaries
- Geographic context
Different names, similar duties: Texas uses a central appraisal district, Tennessee uses a Property Assessor, and Illinois uses a Supervisor of Assessments. None of those value offices should be confused with the office that posts the live tax balance.
Map disclaimer: Online parcel maps are useful research tools but generally do not replace a recorded plat, deed legal description, title examination or survey prepared by a licensed professional.
Jump to a Williamson County Property Task
How to Search Williamson County Property Records
Confirm Texas, Tennessee or Illinois.
Use the physical property address and nearby city. Do not choose a county portal based only on the owner’s mailing address.
Choose the type of record.
Decide whether you need assessed value, market value, tax bill, payment receipt, exemption, appeal, deed, plat or GIS map.
Open the correct official office.
Use WCAD, the Tennessee Property Assessor or Illinois Supervisor of Assessments for property values; use the Tax Office, Trustee or Treasurer for the live tax account.
Start with the strongest identifier.
Use the complete Property ID, parcel number, account number, map-and-parcel reference or tax receipt number when available.
Simplify an address search.
Enter the house number and main street name. Remove punctuation, city, ZIP code, unit number and road-type abbreviations if no result appears.
Broaden an owner-name search.
Start with the surname or primary business name. Try trusts, estates, LLCs, prior owners and spelling variations.
Open every plausible result.
One owner can have several parcels, business personal-property accounts, condominium units or adjoining tracts.
Match the complete property identity.
Compare state, county, owner, physical address, parcel identifier, legal description, property type and assessment year.
Save the identifiers.
Retain the Property ID, parcel, account, map, tax receipt or document number for later searches.
Open the live tax portal before paying.
Assessment data can show estimated or prior information, but the collection office controls the current balance, penalty, payment and receipt.
Six Fields to Match on a Williamson County Record
State
TX, TN or IL
Parcel ID
Match every character
Owner
Current or prior owner
Address
Physical property location
Tax year
Assessment and payable year
Districts
City, school and special units
Do not pay by owner name alone: An owner may have several properties or business accounts. Always match the parcel, physical address, assessment or payable year and complete taxing-unit information.
Williamson County 2026 Assessment and Tax Status
Texas: appraisal protest period passed
WCAD published May 15, 2026, as the ordinary protest deadline. Local property-tax databases are updated during August and September as taxing units propose and adopt rates.
2026 statements are expected around mid-October, with payment due by January 31, 2027.
Tennessee: Board appointment period passed
Owners were instructed to contact the Property Assessor by June 11, 2026, to schedule a County Board of Equalization appeal.
2025 property taxes became delinquent after February 28, 2026, with monthly interest beginning March 1.
Illinois: watch assessment publication
Illinois assessment complaints are generally tied to the publication of the assessment roll. Williamson County’s FAQ instructs owners to file within 30 days of publication.
Confirm both the assessment year and payable year because Illinois tax bills commonly follow a later collection cycle.
Notice-specific deadlines control: A corrected assessment, exemption denial, omitted-property notice, Board decision or later mailing can create a separate filing period. Use the date printed on the official notice.
TX
Williamson County Texas Property Search — Georgetown and Round Rock
Williamson Central Appraisal District, commonly called WCAD, determines taxable property, ownership, values, exemptions and taxing jurisdictions. The Williamson County Tax Assessor-Collector maintains property-tax statements, balances, receipts, payments and tax certificates. The County Clerk maintains deeds, liens, releases and other official public records.
Williamson Central Appraisal District
625 FM 1460
Georgetown, TX 78626
512-930-3787
Monday–Friday, 8:00 a.m.–5:00 p.m.
Georgetown, TX 78626
512-930-3787
Monday–Friday, 8:00 a.m.–5:00 p.m.
2026 tax cycle
Statements expected mid-October 2026.
Payment deadline: January 31, 2027.
Delinquency begins February 1, 2027.
Payment deadline: January 31, 2027.
Delinquency begins February 1, 2027.
Texas property-search micro-steps
Open the WCAD Property Search.
Search by owner name, property address, Property ID or advanced criteria.
Open the correct account.
Match the situs address, owner, legal description, parcel identifier and property type.
Review market, assessed and taxable values separately.
A homestead cap or exemption can cause the figures to differ.
Check exemptions and taxing entities.
Review homestead, over-65, disability, disabled-veteran, agricultural and other applicable entries.
Open the Tax Office property search.
Search by owner, property address or account number for the statement, receipt and live balance.
Use County Clerk records for ownership documents.
Search deeds, liens, releases and recorded instruments separately from WCAD.
Texas online-payment facts
eCheck
The Tax Office currently lists no vendor convenience fee for online eCheck payments.
Credit or debit card
The published online card fee is 2.15%, with a minimum charge of $2.50.
Posting time
Online payments may require approximately five to seven business days to appear, while retaining the original payment date.
2026 rate-information season: Williamson County’s local tax database is updated during August and September as taxing entities propose and adopt rates. Use the property’s subscription option to receive database-update notices when available.
WCAD does not collect taxes: Use WCAD for values, exemptions, ownership and protests; use the County Tax Office for bills, balances, payment plans and receipts.
TN
Williamson County Tennessee Property Assessor Search — Franklin
The Williamson County Property Assessor discovers, lists, classifies and values real, personal and mixed property. The Trustee collects county property taxes. The Register of Deeds maintains deeds, plats and other recorded instruments. Municipal property taxes may be billed separately by the applicable city.
Property Assessor
Main telephone: 615-790-5708
The regular Administrative Complex office is being remodeled. Most staff have temporarily moved to 305 Beasley Drive.
The regular Administrative Complex office is being remodeled. Most staff have temporarily moved to 305 Beasley Drive.
Trustee
1320 W. Main Street, Suite 203
Franklin, TN 37064
615-790-5709
Monday–Friday, 8:00 a.m.–4:30 p.m.
Franklin, TN 37064
615-790-5709
Monday–Friday, 8:00 a.m.–4:30 p.m.
Tennessee property-search fields
- Owner name
- Property address
- Subdivision
- City
- Lot number
- Map and parcel
- Sale-date range
- Sale price and parcel description
Tennessee tax-payment position
Normal payment period
County tax bills are generally mailed in early October and are payable through the last day of February.
Partial payments accepted
Delinquent interest
Interest begins at 1.5% on March 1 and accrues on the first day of each additional month.
Trustee cannot waive interest
Card processing fee
The Trustee’s published credit and debit card processing fee is 2.75% of the transaction.
Review live checkout total
Prior owner on the tax roll: Tennessee tax records can continue to display the deeded owner as of January 1. A buyer should verify the deed and closing statement rather than assuming a prior owner name means the purchase was not recorded.
2026 appeal status: The County Board of Equalization met during June, and property owners were instructed to contact the Assessor no later than June 11, 2026, to schedule an appointment. Contact the Assessor about any later notice or remaining state-level appeal route.
Business personal property: The timely 2026 Schedule B deadline was March 2, 2026. Failure to report business assets can lead to a forced assessment and penalties.
IL
Williamson County Illinois Assessment Search — Marion
The Supervisor of Assessments maintains assessment records, exemptions, deed-related ownership updates, parcel data and Board of Review administration. The County Treasurer collects real estate and mobile-home taxes. The County Clerk and Recorder maintains recorded land documents, while the county GIS portal provides parcel and aerial-map access.
Illinois record fields to separate
Assessment year
The year for which the property was valued and assessed.
Payable year
The later year in which the resulting tax bill is collected.
Equalized assessed value
Assessed value after applicable equalization and exemptions.
Taxing districts
County, township, school, fire, library, municipality and other units.
Exemptions
General homestead, senior, senior freeze, disabled-person and veteran benefits when approved.
Tax balance
Controlled by the Treasurer rather than the Supervisor of Assessments.
Parcel-map coverage: The county GIS page describes a searchable aerial and parcel database covering more than 46,000 Williamson County land parcels.
Senior Freeze change: The county has announced that income limits changed for the 2026 assessment year, payable in 2027. Review the current exemption instructions rather than relying on a prior-year income limit.
Appeal deadline: Williamson County’s property-tax FAQ says assessment complaints should generally be filed within 30 days after assessment-roll publication. Waiting for the tax bill is usually too late to challenge the underlying assessment.
How Property Value Becomes a Williamson County Tax Bill
Property record
Owner, parcel, land, buildings, legal description, sales and property characteristics.
Maintained by the value or assessment office.
Assessed or taxable value
Value after state ratios, exemptions, caps, classifications or special valuation.
Terminology differs by state.
Taxing jurisdictions
County, city, school, fire, special district and other authorized local units.
Property location determines the jurisdiction mix.
Live tax account
Tax, discount, fee, installment, penalty, interest and payment information.
Controlled by the collection office.
| Question | Texas | Tennessee | Illinois |
|---|---|---|---|
| Who determines property value? | Williamson CAD | Property Assessor | Supervisor of Assessments |
| Who maintains the tax bill? | Tax Assessor-Collector | County Trustee | County Treasurer |
| Who records deeds? | County Clerk | Register of Deeds | County Clerk and Recorder |
| Who hears the first local appeal? | Appraisal Review Board | County Board of Equalization | Board of Review |
How to Search and Pay Williamson County Property Taxes
Open the assessment record first.
Save the exact parcel, Property ID, map-and-parcel number or owner information.
Open the correct collection office.
Use the Texas Tax Office, Tennessee Trustee or Illinois Treasurer.
Search the live tax record.
Enter the strongest available identifier and open every relevant tax year or payable year.
Match the property again.
Confirm the physical address, parcel, owner, taxing districts and year before paying.
Review payment charges.
Check the card-processing fee, eCheck fee, returned-payment charge and posting time.
Save proof immediately.
Keep the confirmation number, date, amount, method, receipt and any mailing evidence.
Verify the posting.
Allow the published processing time, then confirm the payment on the live account before paying again.
Texas online eCheck
$0 fee
Texas card
2.15%, $2.50 minimum
Tennessee card
2.75%
Illinois delinquent interest
1.5% per month or part
Fee comparison is not a tax comparison: The bars help distinguish published payment or delinquency charges. They do not compare total property-tax burdens among the three states.
Williamson County Property Assessment Appeals
| State | Local appeal office | 2026 position | Evidence to prepare |
|---|---|---|---|
| Texas | WCAD and Appraisal Review Board | Ordinary May 15 deadline has passed. | Comparable sales, closing statement, photos, repair estimates, appraisal and property-data corrections. |
| Tennessee | Property Assessor and County Board of Equalization | June 11 appointment deadline has passed. | Fair-market-value evidence, sales, property condition, incorrect inventory and classification facts. |
| Illinois | Supervisor of Assessments and Board of Review | Deadline is tied to assessment-roll publication. | Comparable assessments, appraisals, sale information, incorrect square footage and exemption records. |
Appeal-preparation checklist
- Correct state and parcel confirmed
- Assessment year identified
- Official notice saved
- Deadline checked on the notice
- Reason for challenge stated clearly
- Comparable properties organized
- Property-condition evidence dated
- Filing confirmation retained
Assessment appeal versus tax complaint: An appeal normally challenges value, classification, property data or exemption treatment. It does not usually challenge dissatisfaction with a tax rate adopted by a city, school district or other taxing body.
Homestead, Senior, Disability and Agricultural Benefits
Texas exemptions
WCAD processes general homestead, age 65 or older, disabled-person, 100% disabled-veteran and qualifying surviving-spouse applications. WCAD states that filing an exemption is free.
Tennessee programs
The Property Assessor handles assessment records, Greenbelt valuation and personal property. Tax relief or freeze programs can involve additional state and Trustee requirements.
Illinois exemptions
The Supervisor of Assessments administers general homestead, senior, senior freeze, disability, veteran and other qualifying property-tax exemptions.
Documents commonly needed
- Completed official application
- Property or parcel identifier
- Proof of ownership
- Proof of principal residence
- Age or disability documentation
- Veteran or surviving-spouse records
- Income documents when required
- Agricultural-use records when applicable
Do not copy rules across states: A Texas homestead exemption, Tennessee Greenbelt application and Illinois Senior Freeze have different qualifications, forms, filing periods and effects.
Williamson County Deeds, Liens, Plats and GIS Maps
Use deed records for legal ownership research
Search grantor, grantee, document number, recording date, book and page, subdivision, instrument type and legal description.
Use GIS for visual context
Review parcel shape, aerial imagery, roads, district layers and neighboring parcels.
Allow for update delays
A deed can be recorded before the assessment, tax and GIS systems display the new owner.
Request certification when needed
Courts, lenders, title companies and government programs may require a certified document instead of an online image.
Assessment ownership is not a title opinion: An assessor or appraisal record may not reveal every lien, easement, restriction, probate issue, ownership interest or title defect.
“I need a recorded property document for Williamson County, __________. The current or prior owner is __________, the property address is __________, and the parcel or document reference is __________. Please confirm the correct search system and whether I need a plain or certified copy.”
Which Records Should Different Property Users Check?
| User situation | Records to review | Best next action |
|---|---|---|
| New buyer | Assessment account, deed, legal description, unpaid tax years and exemptions. | Confirm title and live tax status before relying on seller documents. |
| Current homeowner | Owner, mailing address, value, exemptions, tax bill and payment posting. | Correct errors early and retain filing or payment confirmations. |
| Mortgage escrow customer | Live tax account, lender disbursement, statement and posted payment. | Avoid duplicate payment by confirming the lender’s payment. |
| Landlord or investor | Every parcel, tax year, business account, exemption and taxing jurisdiction. | Review each parcel independently rather than assuming one payment covers all accounts. |
| Inherited property | Deed, probate documents, assessment ownership, mailing address and tax balance. | Resolve ownership documents before expecting every database to update. |
| Business owner | Business personal-property schedule, forced assessment, tax bill and closure records. | Notify both the assessment office and other required agencies when the business closes. |
| Assessment appellant | Official notice, property card, comparable properties, photos and factual corrections. | File by the notice-specific deadline and save confirmation. |
| Buyer needing formal proof | Live tax account, delinquent years and certified deed or tax document. | Request formal records instead of relying only on browser screenshots. |
Williamson County Property Search Problems and Fixes
| Problem | Practical fix | Correct office |
|---|---|---|
| Wrong Williamson County appears | Confirm the state, nearby city and ZIP code before searching again. | Correct state portal |
| Address returns no result | Use house number and main street name; remove city, ZIP and punctuation. | Assessment office |
| Owner search gives too many matches | Add street, parcel, subdivision, city or property type. | Assessment office |
| Owner search gives no result | Try surname only, prior owner, trust, estate, LLC or spelling variation. | Assessment office and Recorder |
| Parcel number fails | Remove spaces and dashes or use the first meaningful portion. | Assessment office |
| Value appears but no bill | Open the Texas Tax Office, Tennessee Trustee or Illinois Treasurer. | Tax collection office |
| Tax bill and value differ | Check assessment year, payable year, exemptions, ratios, rates and districts. | Assessment and tax offices |
| Deed owner differs from assessor | Confirm the recording date and allow time for the assessment system to update. | Recorder, then assessment office |
| GIS line appears incorrect | Compare the deed, plat and survey; do not rely only on the web map. | GIS, Recorder or surveyor |
| Payment does not appear | Keep confirmation, check bank activity and contact the collection office before paying twice. | Tax collection office |
| Appeal deadline passed | Check for a later notice, secondary appeal level or limited correction route. | Assessment office and appeal board |
| Need formal ownership proof | Request the recorded deed or certified copy rather than relying on the assessor page. | Clerk or Recorder |
“I am searching for property in Williamson County, __________. The address is __________, the owner or former owner is __________, and the parcel or account number is __________. Please confirm whether I need the assessment office, tax collection office, Recorder or GIS department.”
Williamson County Official Property Search Action Center
Choose the state first, then use the matching official portal for the final live search, payment, filing or document request.
Texas Property Search
Search WCAD values, owner information, exemptions and property details.
Texas Tax Search
Find statements, balances, receipts, payment options and taxing units.
Tennessee Property Search
Search owner, address, subdivision, map, parcel and sales information.
Tennessee Tax Search
Review the Trustee’s county property-tax account and payment route.
Illinois Assessments
Review assessment research, exemptions and Board of Review resources.
Illinois GIS Search
Open the official county parcel and aerial-map route.
Texas Deeds and Liens
Search Williamson County Clerk Official Public Records.
Tennessee Deeds and Plats
Open Williamson County Register of Deeds services.
Williamson County Property Assessor Search FAQs
1. Which Williamson County property assessor search should I use?
Use Williamson CAD for Georgetown, Round Rock and other Williamson County, Texas properties; use the Williamson County Property Assessor for Franklin and Williamson County, Tennessee; and use the Supervisor of Assessments for Marion and Williamson County, Illinois.
2. Can I search Williamson County property records by address?
Yes. The official Texas, Tennessee and Illinois systems provide address-based property-search routes. Start with the house number and main street name, then remove punctuation, unit numbers, city and ZIP code if the complete address returns no result.
3. Can I search Williamson County property by owner name?
Yes, although the available fields differ by portal. Start with the surname or main business name and try trusts, estates, LLCs, prior owners and spelling variations when an exact search fails.
4. Where do I pay Williamson County property taxes?
Use the Williamson County Tax Assessor-Collector in Texas, the County Trustee in Tennessee and the County Treasurer in Illinois. The assessment office determines or maintains values but does not control the final live tax balance.
5. What is the difference between assessed value and a tax bill?
The assessment office determines or maintains property value and taxable assessment. The collection office applies tax rates, districts, discounts, penalties, interest and payments to create the live tax account.
6. What are the 2026 Williamson County property-tax deadlines?
Texas 2026 tax statements are expected around mid-October and are due by January 31, 2027. Tennessee 2025 taxes were due by February 28, 2026, and became delinquent March 1. Illinois due dates depend on the payable-year tax bill, while assessment appeals are generally tied to roll publication.
7. How do I appeal a Williamson County property assessment?
Texas owners file with WCAD and the Appraisal Review Board, Tennessee owners begin with the Property Assessor and County Board of Equalization, and Illinois owners file with the Board of Review according to the assessment-roll publication deadline.
8. Where can I find Williamson County deeds and liens?
Use the County Clerk Official Public Records system in Texas, the Register of Deeds in Tennessee and the County Clerk and Recorder in Illinois. Search by party name, document number, recording date, subdivision, book and page or legal description.
9. Is a Williamson County GIS parcel map a legal survey?
No. GIS maps provide useful visual parcel context, but online boundary lines generally do not replace a recorded plat, legal description, title examination or survey completed by a licensed professional.
10. What should I verify before relying on a Williamson County property record?
Verify the state, county, nearby city, parcel or account identifier, property address, owner, legal description, property type, assessment year, payable year and taxing jurisdictions. Check the live tax bill and recorded deed through their separate official offices.
Official Sources and Editorial Verification
Williamson CAD
Texas values, exemptions, e-services, parcel maps and appraisal information.
Williamson County Texas Tax Office
Tax search, payments, fees, deadlines and current office information.
Tennessee Property Assessor
Property search, values, ownership, mapping, Greenbelt and appeal information.
Tennessee Trustee
Property-tax due dates, payment methods, delinquency and office details.
Illinois Supervisor of Assessments
Assessment research, exemptions, GIS contacts and Board of Review services.
Illinois County Treasurer
Tax bills, payments, interest, mobile-home taxes and tax-sale information.
What was reviewed: Official property searches, tax-payment routes, office responsibilities, current addresses, 2026 protest information, payment fees, tax deadlines, exemption routes, GIS systems and recorded-document offices.
CountyPropertyAppraiser.org is an independent informational website. It is not affiliated with Williamson Central Appraisal District, any Williamson County government, Tax Assessor-Collector, Property Assessor, Supervisor of Assessments, Trustee, Treasurer, Clerk, Recorder, Board of Equalization, Board of Review or Appraisal Review Board.
Property ownership, values, tax bills, fees, interest, deadlines, exemptions, office locations, elected officials and portal interfaces can change. Confirm time-sensitive information with the responsible official office before paying taxes, filing an appeal, applying for an exemption, purchasing property or relying on a legal record.
Last reviewed: August 6, 2026.
Slug: williamson-county-property-assessor