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Austin-Round Rock-San Marcos, TX

Cost of living in Williamson County, TX

Part of the Austin Metro Area

Estimated monthly cost
$3,709/mo
for a single person, all categories combined

Population 643,889 · Last updated May 21, 2026

Cost breakdown

Single person, by category, per month.

Rent $1,650 44%
Federal tax $741 20%
Healthcare $480 13%
Groceries $334 9%
Transport $250 7%
Energy $199 5%
Water $55 1%
State tax $0 0%

Rent in Williamson County

Fair Market Rents by bedroom count.

Studio
$1,549
per month
1 bedroom
$1,650
per month
2 bedroom
$1,949
per month
3 bedroom
$2,484
per month
4 bedroom
$2,882
per month

Source: HUD FMR FY2025

Income and earnings in Williamson County

Annual earnings figures from the Census ACS.

Household income
$108,309
per year
Individual earnings
$55,355
per year
Per capita
$51,260
per year

Source: ACS 2019-2023 5-Year.

Home values in Williamson County

Average values reported by homeowners.

Average home value
$414,600
Annual property tax
$7,079

Source: ACS 2019-2023 5-Year

Energy costs in Williamson County

Estimated monthly electricity and gas costs.

Electricity
$167
per month · 14.5¢/kWh
Natural gas
$32
per month
Annual total
$2,388
per year

Source: EIA

Healthcare in Williamson County

Insurance premiums and coverage rates.

Individual premium
$480
per month
Family premium
$1,350
per month
Uninsured rate
9.5%

Source: ACS + national avg. Marketplace benchmark premiums are second-lowest Silver plan estimates and do not reflect employer plans, subsidies, or out-of-pocket costs. This is not healthcare advice.

Taxes in Williamson County

State and local tax rates for Texas.

No state income tax
Texas does not levy a personal income tax.
State sales tax
6.3%
Combined sales tax
8.2%
incl. average local

Tax rates change. Consult a qualified tax professional for advice on your specific situation. This is not tax advice.

Transportation in Williamson County

Commute patterns and estimated costs.

Average commute
27.9 min
Drive alone
66.0%
Public transit
0.4%
Work from home
23.3%

Source: ACS

Monthly cost estimates for Williamson County

What it costs to live in Williamson County each month.

Single person
$3,709
per month
  • Rent $1,650
  • Energy $199
  • Water $55
  • Groceries $334
  • Transport $250
  • Healthcare $480
  • Federal tax $741
  • State tax $0
Couple
$5,463
per month
  • Rent $1,949
  • Energy $239
  • Water $65
  • Groceries $553
  • Transport $350
  • Healthcare $864
  • Federal tax $1,443
  • State tax $0
Family
$8,140
per month
  • Rent $2,484
  • Energy $298
  • Water $75
  • Groceries $840
  • Transport $450
  • Healthcare $1,350
  • Childcare $1,200
  • Federal tax $1,443
  • State tax $0

Frequently asked questions about Williamson County

Common questions about cost of living, rent and salary.

What is the average rent in Williamson County?

In Williamson County, TX, a one-bedroom apartment averages $1,650 per month, a two-bedroom averages $1,949 per month, a three-bedroom averages $2,484 per month, according to HUD Fair Market Rent data.

What is the average salary in Williamson County?

In Williamson County, TX, the average household income is $108,309 per year and individual earnings for full-time workers average $55,355 per year, according to U.S. Census Bureau data.

What is the cost of living in Williamson County?

The estimated cost of living in Williamson County, TX is approximately $3,709 per month for a single person, $5,463 for a couple, $8,140 for a family. This includes rent, utilities, groceries, transportation, healthcare, and taxes.

What is the sales tax rate in Williamson County?

The combined sales tax rate in Williamson County, TX is 8.19%, which includes the Texas state rate of 6.25% plus an average local rate of 1.94%.

Is Williamson County an affordable place to live?

Based on the data, a single person in Williamson County, TX would need approximately $3,709 per month to cover rent, utilities, food, transport, healthcare, and taxes. The average household income is $108,309 per year ($9,026 per month). Williamson County is relatively affordable compared to the national average.

How much does healthcare cost in Williamson County?

The ACA marketplace benchmark premium in Williamson County, TX is approximately $480 per month for an individual. Approximately 9.5% of residents are uninsured. Actual costs vary based on employer coverage, plan type, and individual circumstances.

What are house prices in Williamson County?

The average home value in Williamson County, TX is $414,600, with average annual property taxes of $7,079, according to U.S. Census Bureau data.

How does Williamson County compare to other areas?

You can compare Williamson County, TX with any other US county using our comparison tool at /compare. Williamson County is in the Austin-Round Rock-San Marcos, TX metro area.

Other counties in Texas

Browse the full list of counties in Texas, ranked by cost of living.

See all counties in Texas

Compare Williamson County with another area

Put two counties side by side to see how rent, taxes and everyday costs stack up.

About this data

All figures on this page come from official U.S. government sources, listed below.

  • HUD FMR FY2025
  • ACS 2019-2023 5-Year
  • EIA
  • ACS + national avg
  • ACS
  • USDA + BEA RPP
Methodology All data sources