Property Tax in Williamson County, Texas
The median real estate tax bill in Williamson County, Texas is $7,079 per year, and the median home is worth $414,600. Both figures are the US Census Bureau's survey medians for owner-occupied households (US Census Bureau, American Community Survey (ACS) 5-year estimates, 2023).
What the Williamson County numbers mean
Read the two medians together: $7,079 is the middle tax bill among owner-occupied households in Williamson County, and $414,600 is the middle home value. Neither figure describes a specific property — together they describe the typical homeowner's situation in the county.
The derived effective rate for Williamson County is 1.71% (median tax ÷ median value). Treat it as an estimate for comparison only: it comes from survey medians of different households, not from the county's rate schedule.
The key figures for Williamson County
| Measure | Williamson County |
|---|---|
| Median real estate taxes paid per year | $7,079 |
| Median home value | $414,600 |
| Derived effective rate* | 1.71% |
| Equivalent monthly tax | $590 |
| Tax per $100,000 of value (derived) | $1,707 |
| Illustrative tax on a $400,000 home (derived rate) | $6,828 |
For context, the Texas medians are $4,111 of tax on $260,400 of value, and the US medians are $2,969 on $303,400. *Derived figures are estimates from Census medians, not official rates.
Williamson County at a glance
- Median tax rank in Texas: #3 of 250 counties
- Median home value rank in Texas: #5 of 250
- Population rank in Texas: #12 of 250 (643,889 residents)
- Population density rank: #13 of 250 (577 people per square mile)
- Land area rank in Texas: #46 of 250 (1,115 sq mi, 0.4% of the combined county land area)
- Median tax as a monthly figure: $590; per $1,000 of home value: $1.71
How Williamson County compares
Set against its state, Williamson County's median bill of $7,079 is about 72% higher than the Texas median ($4,111). Against the country as a whole it is about 138% higher than the US median ($2,969). That places the county #3 of 250 Texas counties ranked by median taxes paid.
Remember what drives the ranking: bills follow home values as much as rates. Williamson County's median home, at $414,600, ranks #5 by value in Texas, while its derived rate of 1.71% compares with a derived US figure of 0.98%.
Some extra context for Williamson County: the median bill works out to about $590 a month, and the derived rate equals roughly $1,707 of tax per $100,000 of home value. The county is home to 643,889 people — the #12 most populous county in Texas, spread over 1,115 square miles, a density of about 577 people per square mile. Its median home value, $414,600, ranks #5 among the state's 250 counties with data.
Zooming out: of 3133 counties nationwide with published Census figures, only 43 record a higher median tax bill than Williamson County — it sits in the top 1% nationally. The county holds roughly 2.2% of Texas's people. Its homes are worth more than the state norm (median $414,600 versus $260,400), and a decade at the derived rate of 1.71% adds up to about 17.07% of the median home's value in tax. The cheapest county in the state, Crockett County, medians $466 — $6,613 less than Williamson County per year.
Counties nearest Williamson County in the Texas ranking
| County | Median tax paid | Median home value | Derived rate* |
|---|---|---|---|
| Travis County, TX | $7,487 | $487,600 | 1.53% |
| Collin County, TX | $7,432 | $447,600 | 1.66% |
| Fort Bend County, TX | $6,965 | $350,300 | 1.99% |
| Denton County, TX | $6,943 | $403,400 | 1.72% |
How the tax is worked out
As an illustration of the arithmetic: at Williamson County's derived rate of 1.71%, a home valued at $400,000 would carry a tax bill of roughly $6,828 a year. That is only an illustration using the derived rate — a real bill is computed from the property's assessed value, its exemptions, and the combined rates of its specific taxing districts, so it can be higher or lower.
The usual sequence is: the local assessor values the property; exemptions are applied; the taxable value is multiplied by the combined local rates; and the county bills and collects the tax, distributing it to the schools, municipalities and districts that levied it.
Checking your assessment in Williamson County
Most successful appeals are won on facts, not arguments. Start with the property record card held by the Williamson County assessor: wrong square footage, an extra room, or a missing homestead exemption are common and fixable. Next, line your assessed value up against recent sales of genuinely similar homes nearby. Many disputes end at an informal conversation with the assessor's office; if yours does not, file the formal appeal with the review board named on your notice before its deadline, evidence attached, and keep paying the bill in the meantime so penalties do not build up.
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Frequently asked questions
What is the median property tax in Williamson County, Texas?
The median real estate tax paid in Williamson County, Texas is $7,079 per year, on a median home value of $414,600 (US Census Bureau, American Community Survey (ACS) 5-year estimates, 2023).
What is the effective property tax rate in Williamson County, Texas?
Dividing Williamson County's median tax bill ($7,079) by its median home value ($414,600) gives a derived effective rate of 1.71%. This is an estimate computed from two Census survey medians — it is not the county's official tax rate.
How does Williamson County compare with the rest of Texas?
By median taxes paid, Williamson County stands at #3 among the 250 Texas counties the Census publishes figures for. Its $7,079 median bill is about 72% higher than the state median ($4,111), and 2 counties in the state record a higher median.
How are property taxes calculated in Williamson County, Texas?
Three steps produce the bill: an assessment of market value by the local assessor, a reduction for exemptions you qualify for (a homestead exemption is the common one), and multiplication by the combined rates of the county, municipality, school district and any special districts covering the property. The median result in Williamson County is $7,079 of tax on a $414,600 median home value.
Can I appeal my property tax assessment in Williamson County, Texas?
Yes. Request your property record card from the Williamson County assessor's office and check it for errors, then compare your assessed value with recent sales of similar homes. If it still looks too high, file a formal appeal with the local review board named on your assessment notice before the deadline printed on the notice — windows are short, often 30 to 90 days.