Gaithersburg, Maryland demographics

Gaithersburg, MD demographics: median age 37.8; 52.5% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Gaithersburg city, Maryland · Incorporated city · GEOID 2431175. The survey estimates a population of 69,825 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Gaithersburg is 37.8 years, with a 90% margin of error of 0.9 years. There are 25,772 households (±648). 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	37.8 ±0.9	39.4 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 69,825
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Under 18	15,851 ±1,094	22.7% ±1.6 pp	22.2%	22.0%
18–34	15,198 ±1,052	21.8% ±1.5 pp	21.7%	22.8%
35–64	28,901 ±1,449	41.4% ±2.1 pp	39.5%	38.0%
65 and older	9,875 ±737	14.1% ±1.1 pp	16.7%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 69,825
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Male	33,553 ±888	48.1% ±1.3 pp	48.7%	49.5%
Female	36,272 ±901	51.9% ±1.3 pp	51.3%	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: 69,825
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
White alone	22,765 ±1,461	32.6% ±2.1 pp	48.2%	61.0%
Black or African American alone	10,502 ±1,224	15.0% ±1.8 pp	29.4%	12.2%
American Indian and Alaska Native alone	741 ±872 · low precision	1.1% ±1.2 pp · low precision	0.4%	0.9%
Asian alone	14,235 ±1,659	20.4% ±2.4 pp	6.6%	6.0%
Native Hawaiian and Other Pacific Islander alone	138 ±32	0.2% ±0.0 pp	0.0%	0.2%
Some other race alone	13,608 ±1,836	19.5% ±2.6 pp	6.9%	7.1%
Two or more races	7,836 ±1,176	11.2% ±1.7 pp	8.5%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 69,825
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Not Hispanic or Latino	48,494 ±1,985	69.5% ±2.8 pp	87.5%	80.7%
Hispanic or Latino	21,331 ±1,992	30.5% ±2.9 pp	12.5%	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: 25,772
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Married-couple family	12,147 ±633	47.1% ±2.2 pp	46.2%	46.9%
Other family: male householder, no spouse present	1,518 ±366	5.9% ±1.4 pp	5.1%	5.1%
Other family: female householder, no spouse present	3,147 ±554	12.2% ±2.1 pp	13.7%	12.2%
Nonfamily: householder living alone	7,474 ±680	29.0% ±2.5 pp	28.7%	28.7%
Nonfamily: householder not living alone	1,486 ±334	5.8% ±1.3 pp	6.4%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 25,772
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Households with people under 18	8,307 ±440	32.2% ±1.5 pp	30.6%	29.5%
Households without people under 18	17,465 ±853	67.8% ±2.8 pp	69.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 25,772
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
One-person nonfamily households	7,474 ±680	29.0% ±2.5 pp	28.7%	28.7%
Two-person households	7,731 ±758	30.0% ±2.8 pp	32.1%	33.8%
Three-person households	4,181 ±500	16.2% ±1.9 pp	16.0%	15.3%
Four-person households	3,290 ±495	12.8% ±1.9 pp	13.3%	12.6%
Five-person households	1,666 ±333	6.5% ±1.3 pp	6.0%	5.9%
Six-person households	850 ±239	3.3% ±0.9 pp	2.4%	2.2%
Seven or more people	580 ±184	2.3% ±0.7 pp	1.5%	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: 69,825
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Native	38,876 ±1,780	55.7% ±2.5 pp	83.4%	85.9%
Foreign born	30,949 ±1,774	44.3% ±2.5 pp	16.6%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 64,832
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
English only	29,778 ±1,551	45.9% ±2.3 pp	78.9%	77.7%
Spanish	16,463 ±1,923	25.4% ±3.0 pp	9.6%	13.6%
French, Haitian, or Cajun	1,622 ±427	2.5% ±0.7 pp	1.3%	0.7%
German or other West Germanic	334 ±160	0.5% ±0.2 pp	0.3%	0.5%
Russian, Polish, or other Slavic	1,091 ±303	1.7% ±0.5 pp	0.6%	0.7%
Other Indo-European	4,163 ±973	6.4% ±1.5 pp	2.5%	2.0%
Korean	890 ±279	1.4% ±0.4 pp	0.6%	0.3%
Chinese, including Mandarin and Cantonese	3,747 ±748	5.8% ±1.2 pp	1.2%	1.1%
Vietnamese	824 ±664 · low precision	1.3% ±1.0 pp · low precision	0.3%	0.5%
Tagalog, including Filipino	895 ±485 · low precision	1.4% ±0.7 pp · low precision	0.6%	0.6%
Other Asian and Pacific Island	2,767 ±958	4.3% ±1.5 pp	1.1%	1.1%
Arabic	259 ±185 · low precision	0.4% ±0.3 pp · low precision	0.4%	0.5%
Other and unspecified	1,999 ±578	3.1% ±0.9 pp	2.5%	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: 48,544
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Less than high school graduate	6,299 ±965	13.0% ±2.0 pp	8.9%	10.4%
High school graduate or equivalency	7,777 ±876	16.0% ±1.8 pp	23.4%	26.0%
Some college, no degree	6,652 ±674	13.7% ±1.4 pp	17.4%	19.1%
Associate’s degree	2,347 ±388	4.8% ±0.8 pp	6.8%	8.8%
Bachelor’s degree	13,486 ±1,070	27.8% ±2.2 pp	22.7%	21.6%
Graduate or professional degree	11,983 ±869	24.7% ±1.7 pp	20.8%	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: 68,931
Category	Count ± MOE	Share ± MOE (pp)	Maryland	U.S.
Same house	57,689 ±1,505	83.7% ±2.2 pp	88.7%	87.7%
Moved within same county	6,895 ±1,333	10.0% ±1.9 pp	5.2%	6.3%
Moved from a different county in the same state	1,299 ±413	1.9% ±0.6 pp	2.8%	3.1%
Moved from a different state	2,033 ±414	2.9% ±0.6 pp	2.6%	2.3%
Moved from abroad	1,015 ±330	1.5% ±0.5 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

14.4% of Gaithersburg residents (±2.1 percentage points) had no health insurance coverage when surveyed, compared with 6.3% in Maryland and 8.4% nationally. 96.5% 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	Gaithersburg	Maryland	U.S.	Compared with Maryland
People without health insurance Civilian noninstitutionalized population	14.4% ±2.1 pp	6.3%	8.4%	Higher
Households with a broadband subscription Households	96.5% ±1.0 pp	92.4%	91.0%	Higher
Veterans Civilian population age 18 and older	2.7% ±0.6 pp	6.8%	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 Gaithersburg . 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 Gaithersburg housing and cost context or return to the city profile.