Census tract · Williamson County
Census Tract 215.15, Williamson County, Texas
Census Tract 215.15, GEOID 48491021515, in Williamson County, Texas, mostly within Round Rock (96% of its census blocks). 4,739 residents in the ACS 2020-2024 5-year estimates (±1,102); the 2020 Census counted 4,553.
Residents, 2020-2024
4,739
±1,102 (90% margin)
2020 Census count: 4,553
Median household income
$103,173
±$22,798 (90% margin)
Williamson County: $111,340
Median home value
$402,800
±$28,217 (90% margin)
Williamson County: $447,000
Median gross rent
$2,257
±$53 (90% margin)
Williamson County: $1,796
Where is Census Tract 215.15?
Census Tract 215.15 is one of 135 census tracts in Williamson County, Texas. It covers 0.60 square miles of land, 7,652 residents per square mile in 2020. Its GEOID, 48491021515, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Round Rock | 96% |
3 census tracts border Census Tract 215.15: Tract 215.09 ($129,167), Tract 215.14 ($82,776) and Tract 215.16 ($56,385). 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 215.15?
The 2020-2024 American Community Survey puts Census Tract 215.15's population at 4,739 (±1,102) in 1,655 households; the 2020 Census counted 4,553 residents and 1,432 housing units.
| Measure | Tract 215.15 | Round Rock |
|---|---|---|
| Total population | 4,739 ±1,102 | 127,786 |
| Households | 1,655 ±363 | 48,647 |
| Average household size | 2.86 ±0.26 | 2.61 |
| Housing units | 1,754 ±389 | 51,143 |
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 215.15?
The median resident of Census Tract 215.15 is 37.0 years old; 21.1% are under 18 and 8.8% are 65 or older. The largest group is non-Hispanic white residents at 58.1%, then Hispanic or Latino residents (of any race) at 27.6%. 13.2% of residents were born outside the United States.
| Measure | Tract 215.15 | Round Rock |
|---|---|---|
| Median age | 37.0 ±5.7 | 36.2 |
| Under 18 years | 21.1% ±5.7 pts | 23.5% |
| 65 years and over | 8.8% ±4.3 pts | 11.2% |
| Hispanic or Latino (any race) | 27.6% ±7.7 pts | 29.7% |
| White alone, not Hispanic | 58.1% ±12.0 pts | 45.9% |
| Black or African American alone, not Hispanic | 5.4% ±4.3 pts | 11.0% |
| Asian alone, not Hispanic | 3.6% ±4.9 pts | 8.1% |
| American Indian and Alaska Native alone, not Hispanic | 0.5% ±0.5 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.0 pts | 0.2% |
| Two or more races, not Hispanic | 4.7% ±3.9 pts | 4.2% |
| Some other race alone, not Hispanic | 0.0% ±1.0 pts | 0.8% |
| Born outside the United States | 13.2% ±4.7 pts | 17.0% |
| Speak a language other than English at home (age 5+) | 26.2% ±8.6 pts | 29.2% |
| Civilian veterans (age 18+) | 15.8% ±8.1 pts | 7.1% |
| With a disability | 23.3% ±11.9 pts | 12.1% |
| No health insurance coverage | 11.4% ±6.0 pts | 11.9% |
| High school graduate or higher (age 25+) | 99.1% ±1.2 pts | 93.5% |
| Bachelor's degree or higher (age 25+) | 47.1% ±6.0 pts | 44.8% |
| Graduate or professional degree (age 25+) | 15.9% ±5.9 pts | 16.8% |
| Lived in the same house a year earlier | 78.6% ±12.6 pts | 80.7% |
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 215.15 earn?
Half of the 1,655 households in Census Tract 215.15 earn less than $103,173 a year (±$22,798), against $111,340 across Williamson County: 78th highest of the county's 134 tracts with a reliable estimate.
| Measure | Tract 215.15 | Round Rock |
|---|---|---|
| Median household income | $103,173 ±$22,798 | $99,287 |
| Mean household income | $143,611 ±$40,836 | $130,406 |
| Per capita income | $51,159 ±$14,137 | $50,365 |
| People below the poverty line | 6.1% ±4.8 pts | 7.8% |
| Children under 18 below the poverty line | 6.0% ±9.3 pts | 11.2% |
| Households receiving SNAP | 4.4% ±4.3 pts | 5.6% |
| Households with a computer | 100.0% ±3.0 pts | 98.3% |
| Households with a broadband subscription | 97.5% ±3.5 pts | 95.1% |
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 215.15?
Owners occupy 66.8% of Census Tract 215.15's occupied homes and renters 33.2%. The median owner-occupied home is valued at $402,800 by its owner (±$28,217). The median renter pays $2,257 a month including utilities.
| Measure | Tract 215.15 | Round Rock |
|---|---|---|
| Median home value (owner-occupied) | $402,800 ±$28,217 | $418,600 |
| Median gross rent | $2,257 ±$53 | $1,763 |
| Renters paying 35% or more of income on rent | 26.0% ±24.9 pts | 40.2% |
| Median monthly owner costs, with a mortgage | $2,043 ±$164 | $2,364 |
| Owner-occupied homes | 66.8% ±18.0 pts | 55.5% |
| Renter-occupied homes | 33.2% ±18.0 pts | 44.5% |
| Housing units | 1,754 ±389 | 51,143 |
| Single-family detached homes | 97.4% ±2.3 pts | 64.4% |
| Mobile homes | 0.0% ±2.8 pts | 0.1% |
| Built 2020 or later | 0.0% ±2.8 pts | 5.5% |
| Built 2010 to 2019 | 2.0% ±1.9 pts | 22.6% |
| Built 1939 or earlier | 0.0% ±2.8 pts | 0.2% |
| Households with no vehicle | 1.9% ±2.0 pts | 3.5% |
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 215.15 get to work?
61.0% of Census Tract 215.15's workers drive alone and 27.7% work from home. The average trip to work takes 29.4 minutes.
| Measure | Tract 215.15 | Round Rock |
|---|---|---|
| In the labor force (age 16+) | 61.0% ±9.8 pts | 72.3% |
| Unemployment rate | 5.1% ±3.5 pts | 3.8% |
| Drove alone to work | 61.0% ±12.6 pts | 64.1% |
| Carpooled | 9.6% ±9.5 pts | 8.8% |
| Public transportation | 1.5% ±2.3 pts | 0.1% |
| Walked | 0.0% ±2.2 pts | 0.9% |
| Worked from home | 27.7% ±14.4 pts | 24.8% |
| Mean travel time to work | 29.4 min ±3.6 | 24.9 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 215.15 compare with the other tracts in Williamson County?
Among Williamson County's tracts with a reliable estimate, Census Tract 215.15 ranks as shown below (1 = highest).
| Measure | In Williamson County | In Round Rock |
|---|---|---|
| Population | 66th of 135 | 17th of 34 |
| Residents per square mile | 2nd of 135 | 2nd of 34 |
| Median household income | 78th of 134 | 20th of 33 |
| Per capita income | 68th of 135 | 15th of 34 |
| Median home value | 85th of 134 | 17th of 33 |
| Median gross rent | 30th of 128 | 12th of 32 |
| Bachelor's degree or higher | 71st of 135 | 18th of 34 |
| Median age | 71st of 135 | 14th of 34 |
| Owner-occupied share | 80th of 134 | 17th of 33 |
The tracts next to it on Williamson County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 205.07 | 75th | $104,100±$25,060 · within the margin of this tract |
| Tract 202.07 | 76th | $103,731±$15,171 · within the margin of this tract |
| Tract 207.13 | 77th | $103,352±$32,442 · within the margin of this tract |
| Tract 215.15 | 78th | $103,173±$22,798 |
| Tract 208.16 | 79th | $102,966±$13,865 · within the margin of this tract |
| Tract 202.08 | 80th | $102,137±$45,813 · within the margin of this tract |
| Tract 201.11 | 81st | $102,031±$15,260 · 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 215.15?
3 of the 18 figures for Census Tract 215.15 on this page carry a coefficient of variation over 40% and are 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