Herndon, Virginia demographics

Herndon, VA demographics: median age 35.1; 53.2% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Herndon town, Virginia · Incorporated town · GEOID 5136648. The survey estimates a population of 24,672 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Herndon is 35.1 years, with a 90% margin of error of 1.2 years. There are 7,796 households (±360). 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	35.1 ±1.2	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 24,672
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Under 18	5,734 ±596	23.2% ±2.4 pp	21.7%	22.0%
18–34	6,522 ±676	26.4% ±2.7 pp	22.8%	22.8%
35–64	9,977 ±720	40.4% ±2.9 pp	38.8%	38.0%
65 and older	2,439 ±320	9.9% ±1.3 pp	16.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 24,672
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Male	12,779 ±453	51.8% ±1.8 pp	49.4%	49.5%
Female	11,893 ±452	48.2% ±1.8 pp	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: 24,672
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
White alone	9,157 ±1,157	37.1% ±4.7 pp	60.2%	61.0%
Black or African American alone	2,008 ±690	8.1% ±2.8 pp	18.6%	12.2%
American Indian and Alaska Native alone	122 ±133 · low precision	0.5% ±0.5 pp · low precision	0.4%	0.9%
Asian alone	3,994 ±766	16.2% ±3.1 pp	6.9%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±25 · low precision	0.0% ±0.1 pp · low precision	0.1%	0.2%
Some other race alone	4,676 ±1,101	19.0% ±4.5 pp	4.4%	7.1%
Two or more races	4,715 ±1,007	19.1% ±4.1 pp	9.5%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 24,672
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Not Hispanic or Latino	16,124 ±1,289	65.4% ±5.2 pp	89.0%	80.7%
Hispanic or Latino	8,548 ±1,285	34.6% ±5.2 pp	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: 7,796
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Married-couple family	4,491 ±340	57.6% ±3.5 pp	48.7%	46.9%
Other family: male householder, no spouse present	484 ±163	6.2% ±2.1 pp	4.6%	5.1%
Other family: female householder, no spouse present	773 ±185	9.9% ±2.3 pp	11.6%	12.2%
Nonfamily: householder living alone	1,407 ±249	18.0% ±3.1 pp	28.5%	28.7%
Nonfamily: householder not living alone	641 ±191	8.2% ±2.4 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 7,796
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Households with people under 18	2,741 ±239	35.2% ±2.6 pp	30.2%	29.5%
Households without people under 18	5,055 ±410	64.8% ±4.3 pp	69.8%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 7,796
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
One-person nonfamily households	1,407 ±249	18.0% ±3.1 pp	28.5%	28.7%
Two-person households	2,400 ±365	30.8% ±4.5 pp	34.0%	33.8%
Three-person households	1,419 ±237	18.2% ±2.9 pp	15.7%	15.3%
Four-person households	1,246 ±202	16.0% ±2.5 pp	12.9%	12.6%
Five-person households	616 ±181	7.9% ±2.3 pp	5.6%	5.9%
Six-person households	370 ±230 · low precision	4.7% ±2.9 pp · low precision	2.1%	2.2%
Seven or more people	338 ±133	4.3% ±1.7 pp	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: 24,672
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Native	14,254 ±893	57.8% ±3.6 pp	86.9%	85.9%
Foreign born	10,418 ±891	42.2% ±3.6 pp	13.1%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 22,937
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
English only	11,162 ±1,141	48.7% ±4.9 pp	82.6%	77.7%
Spanish	6,705 ±1,292	29.2% ±5.6 pp	7.9%	13.6%
French, Haitian, or Cajun	274 ±211 · low precision	1.2% ±0.9 pp · low precision	0.5%	0.7%
German or other West Germanic	84 ±50 · low precision	0.4% ±0.2 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	246 ±137 · low precision	1.1% ±0.6 pp · low precision	0.4%	0.7%
Other Indo-European	2,273 ±664	9.9% ±2.9 pp	2.6%	2.0%
Korean	117 ±84 · low precision	0.5% ±0.4 pp · low precision	0.7%	0.3%
Chinese, including Mandarin and Cantonese	271 ±171 · low precision	1.2% ±0.7 pp · low precision	0.7%	1.1%
Vietnamese	156 ±123 · low precision	0.7% ±0.5 pp · low precision	0.6%	0.5%
Tagalog, including Filipino	32 ±44 · low precision	0.1% ±0.2 pp · low precision	0.6%	0.6%
Other Asian and Pacific Island	832 ±281	3.6% ±1.2 pp	1.2%	1.1%
Arabic	78 ±66 · low precision	0.3% ±0.3 pp · low precision	0.8%	0.5%
Other and unspecified	707 ±440 · low precision	3.1% ±1.9 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: 16,563
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Less than high school graduate	2,428 ±488	14.7% ±2.9 pp	8.4%	10.4%
High school graduate or equivalency	2,353 ±424	14.2% ±2.5 pp	23.9%	26.0%
Some college, no degree	2,115 ±353	12.8% ±2.1 pp	17.7%	19.1%
Associate’s degree	859 ±222	5.2% ±1.3 pp	7.8%	8.8%
Bachelor’s degree	5,038 ±593	30.4% ±3.4 pp	23.7%	21.6%
Graduate or professional degree	3,770 ±486	22.8% ±2.8 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: 24,311
Category	Count ± MOE	Share ± MOE (pp)	Virginia	U.S.
Same house	20,319 ±866	83.6% ±3.5 pp	86.9%	87.7%
Moved within same county	2,260 ±794	9.3% ±3.3 pp	4.6%	6.3%
Moved from a different county in the same state	523 ±304 · low precision	2.2% ±1.3 pp · low precision	4.7%	3.1%
Moved from a different state	901 ±340	3.7% ±1.4 pp	3.1%	2.3%
Moved from abroad	308 ±181 · low precision	1.3% ±0.7 pp · low precision	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

16.9% of Herndon residents (±3.2 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Virginia 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	Herndon	Virginia	U.S.	Compared with Virginia
People without health insurance Civilian noninstitutionalized population	16.9% ±3.2 pp	6.9%	8.4%	Higher
Households with a broadband subscription Households	96.0% ±1.9 pp	91.0%	91.0%	Higher
Veterans Civilian population age 18 and older	5.4% ±1.1 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 Herndon . 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 Herndon housing and cost context or return to the city profile.