Fairfax, Virginia demographics

Fairfax, VA demographics: median age 36.6; 62.4% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Fairfax city, Virginia · Incorporated city · GEOID 5126496. The survey estimates a population of 25,026 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Fairfax is 36.6 years, with a 90% margin of error of 0.9 years. There are 9,155 households (±117). 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	36.6 ±0.9	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 25,026
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Under 18	6,210 ±498	24.8% MOE unavailable	21.7%	22.0%
18–34	5,729 ±361	22.9% MOE unavailable	22.8%	22.8%
35–64	9,569 ±513	38.2% MOE unavailable	38.8%	38.0%
65 and older	3,518 ±327	14.1% MOE unavailable	16.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 25,026
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Male	12,317 ±160	49.2% MOE unavailable	49.4%	49.5%
Female	12,709 ±160	50.8% MOE unavailable	50.6%	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: 25,026
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
White alone	13,215 ±229	52.8% MOE unavailable	60.2%	61.0%
Black or African American alone	1,585 ±147	6.3% MOE unavailable	18.6%	12.2%
American Indian and Alaska Native alone	61 ±61 · low precision	0.2% MOE unavailable	0.4%	0.9%
Asian alone	4,597 ±224	18.4% MOE unavailable	6.9%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±25 · low precision	0.0% MOE unavailable	0.1%	0.2%
Some other race alone	2,697 ±485	10.8% MOE unavailable	4.4%	7.1%
Two or more races	2,871 ±497	11.5% MOE unavailable	9.5%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 25,026
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Not Hispanic or Latino	20,298 MOE unavailable	81.1% MOE unavailable	89.0%	80.7%
Hispanic or Latino	4,728 MOE unavailable	18.9% MOE unavailable	11.0%	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: 9,155
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Married-couple family	4,738 ±305	51.8% ±3.3 pp	48.7%	46.9%
Other family: male householder, no spouse present	436 ±133	4.8% ±1.5 pp	4.6%	5.1%
Other family: female householder, no spouse present	601 ±164	6.6% ±1.8 pp	11.6%	12.2%
Nonfamily: householder living alone	2,300 ±304	25.1% ±3.3 pp	28.5%	28.7%
Nonfamily: householder not living alone	1,080 ±208	11.8% ±2.3 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 9,155
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Households with people under 18	2,725 ±225	29.8% ±2.4 pp	30.2%	29.5%
Households without people under 18	6,430 ±261	70.2% ±2.7 pp	69.8%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 9,155
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
One-person nonfamily households	2,300 ±304	25.1% ±3.3 pp	28.5%	28.7%
Two-person households	2,831 ±309	30.9% ±3.3 pp	34.0%	33.8%
Three-person households	1,542 ±272	16.8% ±3.0 pp	15.7%	15.3%
Four-person households	1,569 ±271	17.1% ±2.9 pp	12.9%	12.6%
Five-person households	602 ±158	6.6% ±1.7 pp	5.6%	5.9%
Six-person households	148 ±82 · low precision	1.6% ±0.9 pp · low precision	2.1%	2.2%
Seven or more people	163 ±88 · low precision	1.8% ±1.0 pp · low precision	1.2%	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: 25,026
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Native	17,366 ±748	69.4% MOE unavailable	86.9%	85.9%
Foreign born	7,660 ±748	30.6% MOE unavailable	13.1%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 22,839
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
English only	14,064 ±572	61.6% ±2.4 pp	82.6%	77.7%
Spanish	3,722 ±401	16.3% ±1.7 pp	7.9%	13.6%
French, Haitian, or Cajun	141 ±67	0.6% ±0.3 pp	0.5%	0.7%
German or other West Germanic	64 ±65 · low precision	0.3% ±0.3 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	55 ±75 · low precision	0.2% ±0.3 pp · low precision	0.4%	0.7%
Other Indo-European	1,272 ±353	5.6% ±1.5 pp	2.6%	2.0%
Korean	282 ±144 · low precision	1.2% ±0.6 pp · low precision	0.7%	0.3%
Chinese, including Mandarin and Cantonese	818 ±266	3.6% ±1.2 pp	0.7%	1.1%
Vietnamese	567 ±229	2.5% ±1.0 pp	0.6%	0.5%
Tagalog, including Filipino	398 ±222 · low precision	1.7% ±1.0 pp · low precision	0.6%	0.6%
Other Asian and Pacific Island	556 ±268	2.4% ±1.2 pp	1.2%	1.1%
Arabic	742 ±319	3.2% ±1.4 pp	0.8%	0.5%
Other and unspecified	158 ±91 · low precision	0.7% ±0.4 pp · low precision	1.1%	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: 16,333
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Less than high school graduate	1,520 ±407	9.3% ±2.5 pp	8.4%	10.4%
High school graduate or equivalency	1,881 ±275	11.5% ±1.7 pp	23.9%	26.0%
Some college, no degree	1,823 ±293	11.2% ±1.8 pp	17.7%	19.1%
Associate’s degree	924 ±207	5.7% ±1.3 pp	7.8%	8.8%
Bachelor’s degree	5,366 ±469	32.9% ±2.9 pp	23.7%	21.6%
Graduate or professional degree	4,819 ±478	29.5% ±2.9 pp	18.5%	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: 24,484
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Same house	20,652 ±581	84.3% ±2.3 pp	86.9%	87.7%
Moved within same county	609 ±330 · low precision	2.5% ±1.3 pp · low precision	4.6%	6.3%
Moved from a different county in the same state	2,138 ±434	8.7% ±1.8 pp	4.7%	3.1%
Moved from a different state	652 ±289	2.7% ±1.2 pp	3.1%	2.3%
Moved from abroad	433 ±179	1.8% ±0.7 pp	0.7%	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

8.5% of Fairfax residents (±1.9 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Virginia and 8.4% nationally. 96.7% 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	Fairfax	Virginia	U.S.	Compared with Virginia
People without health insurance Civilian noninstitutionalized population	8.5% ±1.9 pp	6.9%	8.4%	Not statistically different
Households with a broadband subscription Households	96.7% ±1.7 pp	91.0%	91.0%	Higher
Veterans Civilian population age 18 and older	7.4% ±1.2 pp	9.4%	6.2%	Lower

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 Fairfax . 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 Fairfax housing and cost context or return to the city profile.