Castle Hills, Texas demographics

Castle Hills, TX demographics: median age 41.4; 49.2% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Castle Hills city, Texas · Incorporated city · GEOID 4813276. The survey estimates a population of 3,943 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Castle Hills is 41.4 years, with a 90% margin of error of 5.8 years. There are 1,491 households (±141). Age and household distributions show how these totals are composed; they do not establish which neighborhood suits a particular person.

Every count and share is an estimate. “±” is a 90% margin of error (MOE); pp means percentage points. Derived shares use the category count divided by the named universe. Aggregated category MOEs and percentage MOEs are approximate. A margin larger than half its estimate is flagged as low precision. Blank source uncertainty is shown as unavailable, never zero.

Age distribution and sex

City, state and U.S. estimates · ACS 2020–2024
Measure / survey universe	City estimate ± MOE	State estimate ± MOE	U.S. estimate ± MOE
Median age Total population · years	41.4 ±5.8	35.6 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 3,943
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Under 18	927 ±225	23.5% ±5.7 pp	25.0%	22.0%
18–34	515 ±133	13.1% ±3.4 pp	24.2%	22.8%
35–64	1,756 ±285	44.5% ±7.2 pp	37.4%	38.0%
65 and older	745 ±122	18.9% ±3.1 pp	13.4%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 3,943
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Male	2,138 ±140	54.2% ±3.5 pp	49.9%	49.5%
Female	1,805 ±143	45.8% ±3.6 pp	50.1%	50.5%

The age groups are mutually exclusive and cover the entire population. The sex categories follow this ACS table’s published classification; they are not a survey of gender identity.

Race and Hispanic origin

Race · B02001 · ACS 2020–2024 Total population: 3,943
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
White alone	1,886 ±408	47.8% ±10.3 pp	48.5%	61.0%
Black or African American alone	46 ±37 · low precision	1.2% ±0.9 pp · low precision	12.2%	12.2%
American Indian and Alaska Native alone	6 ±11 · low precision	0.2% ±0.3 pp · low precision	0.7%	0.9%
Asian alone	149 ±101 · low precision	3.8% ±2.6 pp · low precision	5.6%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±15 · low precision	0.0% ±0.4 pp · low precision	0.1%	0.2%
Some other race alone	304 ±165 · low precision	7.7% ±4.2 pp · low precision	9.3%	7.1%
Two or more races	1,552 ±392	39.4% ±9.9 pp	23.5%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 3,943
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Not Hispanic or Latino	1,765 ±370	44.8% ±9.4 pp	60.3%	80.7%
Hispanic or Latino	2,178 ±370	55.2% ±9.4 pp	39.7%	19.3%

Hispanic origin and race are separate questions. People of Hispanic or Latino origin may be of any race and appear in both tables. Do not add the Hispanic share to race shares. Race alone and two-or-more-race groups are the mutually exclusive categories of the race table.

Household types, children and living alone

Household types · B11001 · ACS 2020–2024 Households: 1,491
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Married-couple family	738 ±92	49.5% ±4.0 pp	48.9%	46.9%
Other family: male householder, no spouse present	58 ±41 · low precision	3.9% ±2.7 pp · low precision	5.4%	5.1%
Other family: female householder, no spouse present	115 ±66 · low precision	7.7% ±4.4 pp · low precision	13.4%	12.2%
Nonfamily: householder living alone	486 ±144	32.6% ±9.2 pp	26.2%	28.7%
Nonfamily: householder not living alone	94 ±48 · low precision	6.3% ±3.2 pp · low precision	6.0%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 1,491
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Households with people under 18	463 ±78	31.1% ±4.3 pp	34.7%	29.5%
Households without people under 18	1,028 ±194	68.9% ±11.3 pp	65.3%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 1,491
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
One-person nonfamily households	486 ±144	32.6% ±9.2 pp	26.2%	28.7%
Two-person households	411 ±100	27.6% ±6.2 pp	31.4%	33.8%
Three-person households	149 ±74	10.0% ±4.8 pp	16.3%	15.3%
Four-person households	264 ±95	17.7% ±6.1 pp	14.2%	12.6%
Five-person households	126 ±65 · low precision	8.5% ±4.3 pp · low precision	7.3%	5.9%
Six-person households	44 ±36 · low precision	3.0% ±2.4 pp · low precision	2.9%	2.2%
Seven or more people	11 ±19 · low precision	0.7% ±1.2 pp · low precision	1.7%	1.4%

A family household contains related people under the Census definition. A nonfamily household can contain one person or unrelated people sharing a home. Households with children can also appear in the household-type and size tables, so those tables must not be added together. Household estimates exclude people living in group quarters from the household universe.

Nativity and languages spoken at home

Nativity · B05002 · ACS 2020–2024 Total population: 3,943
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Native	3,384 ±217	85.8% ±5.5 pp	82.4%	85.9%
Foreign born	559 ±216	14.2% ±5.5 pp	17.6%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 3,668
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
English only	2,421 ±417	66.0% ±11.2 pp	64.9%	77.7%
Spanish	1,152 ±358	31.4% ±9.7 pp	28.1%	13.6%
French, Haitian, or Cajun	12 ±17 · low precision	0.3% ±0.5 pp · low precision	0.3%	0.7%
German or other West Germanic	0 ±15 · low precision	0.0% ±0.4 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	3 ±5 · low precision	0.1% ±0.1 pp · low precision	0.2%	0.7%
Other Indo-European	12 ±18 · low precision	0.3% ±0.5 pp · low precision	1.7%	2.0%
Korean	22 ±36 · low precision	0.6% ±1.0 pp · low precision	0.2%	0.3%
Chinese, including Mandarin and Cantonese	8 ±13 · low precision	0.2% ±0.4 pp · low precision	0.7%	1.1%
Vietnamese	0 ±15 · low precision	0.0% ±0.4 pp · low precision	0.9%	0.5%
Tagalog, including Filipino	7 ±12 · low precision	0.2% ±0.3 pp · low precision	0.3%	0.6%
Other Asian and Pacific Island	28 ±41 · low precision	0.8% ±1.1 pp · low precision	1.1%	1.1%
Arabic	3 ±5 · low precision	0.1% ±0.1 pp · low precision	0.4%	0.5%
Other and unspecified	0 ±15 · low precision	0.0% ±0.4 pp · low precision	0.7%	0.8%

Foreign born means not a U.S. citizen at birth; it includes naturalized citizens. Language categories describe speech at home among people age five and older. A language other than English at home does not establish that someone cannot speak English. This city page uses the published C16001 summary categories because the more detailed B16001 table does not provide these city records in this release.

Educational attainment

Highest completed education · B15003 · ACS 2020–2024 Population age 25 and older: 2,773
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Less than high school graduate	224 ±146 · low precision	8.1% ±5.2 pp · low precision	14.0%	10.4%
High school graduate or equivalency	503 ±160	18.1% ±5.7 pp	24.3%	26.0%
Some college, no degree	435 ±135	15.7% ±4.8 pp	20.1%	19.1%
Associate’s degree	247 ±83	8.9% ±2.9 pp	7.7%	8.8%
Bachelor’s degree	833 ±131	30.0% ±4.4 pp	21.5%	21.6%
Graduate or professional degree	531 ±134	19.1% ±4.7 pp	12.3%	14.1%

The denominator excludes residents under 25. Each person is counted in the highest attainment category they completed. This table does not measure the quality of local schools or the education level of every current student.

Residence one year earlier

Geographic mobility · B07003 · ACS 2020–2024 Population age 1 and older: 3,933
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Same house	3,580 ±169	91.0% ±4.3 pp	86.0%	87.7%
Moved within same county	323 ±160	8.2% ±4.1 pp	7.4%	6.3%
Moved from a different county in the same state	9 ±9 · low precision	0.2% ±0.2 pp · low precision	3.9%	3.1%
Moved from a different state	20 ±26 · low precision	0.5% ±0.7 pp · low precision	2.0%	2.3%
Moved from abroad	1 ±2 · low precision	0.0% ±0.1 pp · low precision	0.8%	0.6%

These are respondents’ residence patterns one year before their survey response, pooled across the five-year window. They are not a net migration count for 2025. A person can move to a different house within the same city or county; moves within the same county should not automatically be interpreted as new arrivals to the city.

Health insurance, internet access and veterans

17.2% of Castle Hills residents (±4.9 percentage points) had no health insurance coverage when surveyed, compared with 17.1% in Texas and 8.4% nationally. 96.0% of households subscribe to broadband of any type, including cellular data plans. A subscription is not the same as available service: the FCC National Broadband Map shows providers at a specific address.

City, state and U.S. shares · ACS 2020–2024
Measure	Castle Hills	Texas	U.S.	Compared with Texas
People without health insurance Civilian noninstitutionalized population	17.2% ±4.9 pp	17.1%	8.4%	Not statistically different
Households with a broadband subscription Households	96.0% ±3.9 pp	91.4%	91.0%	Higher
Veterans Civilian population age 18 and older	5.7% ±2.5 pp	6.2%	6.2%	Not statistically different

Reading and reusing the estimates

The Census table links above lead to the original detailed tables. Counts, source universes and uncertainty are retained in the source observation download for Castle Hills . Compare these figures with the same survey window; do not compare one city’s five-year estimate with another city’s annual estimate as though they measured the same period. For methods, see uncertainty and denominator calculations.

Read Castle Hills housing and cost context or return to the city profile.