Williamson County Property Tax Calculator
Locality estimate page for Williamson County, Texas. Use this county/locality rate for faster screening, then confirm parcel-specific details with your local tax authority.
County/Locality Effective Rate
1.61%
State Effective Rate
1.40%
Sample Annual Tax Difference
$893
Median Home Value (ACS)
$447,000
Median Annual Tax Bill (ACS)
$7,205
Owner-Occupied Households
167,540
The typical owner-occupied home in Williamson County is valued at $447,000 with a median real estate tax bill of $7,205 per year — an effective rate of 1.61%. Both figures come from the same ACS release, so the ratio is an estimate rather than an aggregate of individual bills.
State Mortgage Context: Texas
Most counties in this state follow the standard FHA floor framework.
State Effective Tax Rate
1.40%
FHA 1-Unit Floor
$541,287
FHA 1-Unit Ceiling
$1,249,125
In Williamson County, Texas, the current county-level estimate is 1.61%, or approximately $6,440 annually on a $400,000 home.
How to Use This County Estimate
Step 1
Enter your property value and assessment assumptions.
Step 2
Apply exemptions that may reduce taxable value.
Step 3
Compare county/locality estimate against statewide fallback.
Williamson County Property Tax Snapshot
Estimated effective rate: 1.61% · vs Texas: 1.40% · vs national benchmark: 0.90%
| Home value | Estimated annual tax | Estimated monthly tax |
|---|---|---|
| $250,000 | $4,025 | $335 |
| $400,000 | $6,440 | $537 |
| $500,000 | $8,050 | $671 |
| $750,000 | $12,075 | $1,006 |
| $1,000,000 | $16,100 | $1,342 |
Compare Nearby Property Taxes
- Williamson County1.61%
- Denton County1.61%
- Harris County1.62%
- Hidalgo County1.62%
- Nueces County1.59%
- Collin County1.58%
- Dallas County1.58%
Source Transparency
Source: U.S. Census Bureau, ACS 5-Year Estimates (B25103 / B25077)
View sourceLast updated: August 2026
Estimates only. Confirm parcel-specific amounts with the official local taxing authority.
Need Statewide Context?
Visit Texas mortgage snapshot or return to the national calculator hub.