Census tract · Williamson County
Census Tract 205.15, Williamson County, Texas
Census Tract 205.15, GEOID 48491020515, in Williamson County, Texas, mostly within Brushy Creek (78% of its census blocks). 3,862 residents in the ACS 2020-2024 5-year estimates (±452); the 2020 Census counted 4,639.
Residents, 2020-2024
3,862
±452 (90% margin)
2020 Census count: 4,639
Median household income
$124,625
±$25,160 (90% margin)
Williamson County: $111,340
Median home value
$430,800
±$50,416 (90% margin)
Williamson County: $447,000
Median gross rent
$2,019
±$188 (90% margin)
Williamson County: $1,796
Where is Census Tract 205.15?
Census Tract 205.15 is one of 135 census tracts in Williamson County, Texas. It covers 0.82 square miles of land, 5,692 residents per square mile in 2020. Its GEOID, 48491020515, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Brushy Creek | 78% |
| Round Rock | 17% |
5 census tracts border Census Tract 205.15: Tract 205.03 ($126,721), Tract 205.05 ($182,396), Tract 205.07 ($104,100), Tract 205.09 ($227,906) and Tract 205.14 ($154,722). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 205.15?
The 2020-2024 American Community Survey puts Census Tract 205.15's population at 3,862 (±452) in 1,471 households; the 2020 Census counted 4,639 residents and 1,717 housing units.
| Measure | Tract 205.15 | Brushy Creek |
|---|---|---|
| Total population | 3,862 ±452 | 19,576 |
| Households | 1,471 ±239 | 7,027 |
| Average household size | 2.58 ±0.29 | 2.78 |
| Housing units | 1,552 ±229 | 7,147 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 205.15?
The median resident of Census Tract 205.15 is 40.9 years old; 23.0% are under 18 and 11.5% are 65 or older. The largest group is non-Hispanic white residents at 48.7%, then non-Hispanic Asian residents at 19.8%. 17.8% of residents were born outside the United States.
| Measure | Tract 205.15 | Brushy Creek |
|---|---|---|
| Median age | 40.9 ±3.2 | 39.5 |
| Under 18 years | 23.0% ±3.0 pts | 26.3% |
| 65 years and over | 11.5% ±3.8 pts | 10.9% |
| Hispanic or Latino (any race) | 17.5% ±4.8 pts | 19.0% |
| White alone, not Hispanic | 48.7% ±7.2 pts | 56.0% |
| Black or African American alone, not Hispanic | 6.2% ±5.0 pts | 6.4% |
| Asian alone, not Hispanic | 19.8% ±5.6 pts | 11.6% |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.2 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.3 pts | 0.0% |
| Two or more races, not Hispanic | 6.1% ±4.4 pts | 6.6% |
| Some other race alone, not Hispanic | 1.6% ±1.7 pts | 0.3% |
| Born outside the United States | 17.8% ±5.7 pts | 15.8% |
| Speak a language other than English at home (age 5+) | 24.7% ±6.3 pts | 21.2% |
| Civilian veterans (age 18+) | 5.1% ±3.4 pts | 5.2% |
| With a disability | 12.6% ±6.0 pts | 8.5% |
| No health insurance coverage | 10.3% ±6.1 pts | 5.6% |
| High school graduate or higher (age 25+) | 95.3% ±5.1 pts | 98.0% |
| Bachelor's degree or higher (age 25+) | 54.9% ±8.2 pts | 57.9% |
| Graduate or professional degree (age 25+) | 20.7% ±4.8 pts | 19.4% |
| Lived in the same house a year earlier | 81.2% ±8.6 pts | 85.2% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Census Tract 205.15 earn?
Half of the 1,471 households in Census Tract 205.15 earn less than $124,625 a year (±$25,160), against $111,340 across Williamson County: 51st highest of the county's 134 tracts with a reliable estimate. 9.1% of residents live below the poverty line.
| Measure | Tract 205.15 | Brushy Creek |
|---|---|---|
| Median household income | $124,625 ±$25,160 | $138,589 |
| Mean household income | $141,819 ±$26,390 | $161,662 |
| Per capita income | $55,469 ±$8,117 | $58,374 |
| People below the poverty line | 9.1% ±5.3 pts | 5.5% |
| Children under 18 below the poverty line | 4.7% ±5.3 pts | 5.1% |
| Households receiving SNAP | 2.0% ±2.1 pts | 2.7% |
| Households with a computer | 99.0% ±1.6 pts | 99.0% |
| Households with a broadband subscription | 97.3% ±2.9 pts | 98.9% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Census Tract 205.15?
Owners occupy 72.1% of Census Tract 205.15's occupied homes and renters 27.9%. The median owner-occupied home is valued at $430,800 by its owner (±$50,416). The median renter pays $2,019 a month including utilities.
| Measure | Tract 205.15 | Brushy Creek |
|---|---|---|
| Median home value (owner-occupied) | $430,800 ±$50,416 | $499,300 |
| Median gross rent | $2,019 ±$188 | $2,127 |
| Renters paying 35% or more of income on rent | 22.8% ±15.3 pts | 26.6% |
| Median monthly owner costs, with a mortgage | $2,379 ±$159 | $2,578 |
| Owner-occupied homes | 72.1% ±7.5 pts | 72.7% |
| Renter-occupied homes | 27.9% ±7.5 pts | 27.3% |
| Housing units | 1,552 ±229 | 7,147 |
| Single-family detached homes | 83.7% ±5.7 pts | 81.6% |
| Mobile homes | 0.0% ±3.2 pts | 0.0% |
| Built 2020 or later | 0.0% ±3.2 pts | 0.3% |
| Built 2010 to 2019 | 11.5% ±4.7 pts | 4.3% |
| Built 1939 or earlier | 0.0% ±3.2 pts | 0.1% |
| Households with no vehicle | 1.4% ±1.7 pts | 1.1% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Census Tract 205.15 get to work?
61.6% of Census Tract 205.15's workers drive alone and 26.2% work from home. The average trip to work takes 25.9 minutes.
| Measure | Tract 205.15 | Brushy Creek |
|---|---|---|
| In the labor force (age 16+) | 69.5% ±5.9 pts | 74.4% |
| Unemployment rate | 5.8% ±4.8 pts | 3.2% |
| Drove alone to work | 61.6% ±5.9 pts | 59.8% |
| Carpooled | 7.1% ±3.9 pts | 6.6% |
| Public transportation | 0.0% ±2.5 pts | 0.0% |
| Walked | 0.4% ±0.7 pts | 0.6% |
| Worked from home | 26.2% ±6.4 pts | 30.9% |
| Mean travel time to work | 25.9 min ±3.2 | 24.2 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
How does Census Tract 205.15 compare with the other tracts in Williamson County?
Among Williamson County's tracts with a reliable estimate, Census Tract 205.15 ranks as shown below (1 = highest).
| Measure | In Williamson County | In Brushy Creek |
|---|---|---|
| Population | 87th of 135 | 3rd of 5 |
| Residents per square mile | 10th of 135 | 2nd of 5 |
| Median household income | 51st of 134 | 4th of 5 |
| Per capita income | 53rd of 135 | 4th of 5 |
| Median home value | 72nd of 134 | 5th of 5 |
| Median gross rent | 49th of 128 | 3rd of 5 |
| Poverty rate | 22nd of 43 | 1st of 1 |
| Bachelor's degree or higher | 50th of 135 | 5th of 5 |
| Median age | 37th of 135 | 2nd of 5 |
| Owner-occupied share | 74th of 134 | 3rd of 5 |
The tracts next to it on Williamson County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 205.03 | 48th | $126,721±$38,453 · within the margin of this tract |
| Tract 204.04 | 49th | $126,466±$26,190 · within the margin of this tract |
| Tract 203.51 | 50th | $124,979±$7,159 · within the margin of this tract |
| Tract 205.15 | 51st | $124,625±$25,160 |
| Tract 214.07 | 52nd | $123,636±$28,100 · within the margin of this tract |
| Tract 214.04 | 53rd | $123,187±$17,412 · within the margin of this tract |
| Tract 204.11 | 54th | $122,778±$23,513 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 205.15?
1 of the 18 figures for Census Tract 205.15 on this page carries a coefficient of variation over 40% and is marked with a ring: they come from a small sample, so read them as rough.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections