City · Maryland
Gaithersburg, Maryland
Gaithersburg, city, in Montgomery County, Maryland. Gaithersburg had 71,113 residents on July 1, 2025 by the Census Bureau's estimate, up 2.1% since 2020; the 2020 Census counted 69,657 and the ACS 2020-2024 5-year estimates put it at 69,825 (±60). GEOID 2431175.
Residents, July 2025 estimate
71,113
Census Bureau estimate (no margin published)
2020 Census count: 69,657 · ACS 2020-2024: 69,825 ±60
Median household income
$112,467
±$6,406 (90% margin)
Maryland: $103,678
Median home value
$496,500
±$17,174 (90% margin)
Maryland: $419,900
Median gross rent
$2,058
±$66 (90% margin)
Maryland: $1,705
Where is Gaithersburg and what county is it in?
Gaithersburg is a city in Montgomery County, Maryland. It covers 10.3 square miles of land, 6,738 residents per square mile in 2020.
Gaithersburg is in the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan statistical area, which takes in 23 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Gaithersburg, and is it growing?
The Census Bureau estimates that 71,113 people lived in Gaithersburg on July 1, 2025, up 2.1% since 2020, faster than Maryland (+1.4%). The 2020 Census counted 69,657 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 69,825 (±60).
| Measure | Gaithersburg | Montgomery County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 69,825 ±60 | 1,065,949 | +2,083 |
| Households | 25,772 ±648 | 389,210 | +973 |
| Average household size | 2.69 ±0.07 | 2.72 | no clear change |
| Housing units | 27,280 ±691 | 406,531 | +1,058 |
Gaithersburg's population since 2000
From 52,613 in 2000 to 71,113 in 2025: up 35.2%. The 2000, 2010 and 2020 figures are census counts, each for Gaithersburg as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Gaithersburg?
The median resident of Gaithersburg is 37.8 years old; 22.7% are under 18 and 14.1% are 65 or older. The largest group is Hispanic or Latino residents (of any race) at 30.5%, then non-Hispanic white residents at 29.7%. 44.3% of residents were born outside the United States.
| Measure | Gaithersburg | Montgomery County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 37.8 ±0.9 | 40.2 | +1.3 |
| Under 18 years | 22.7% ±1.0 pts | 22.8% | – |
| 65 years and over | 14.1% ±1.0 pts | 17.0% | – |
| Male | 48.1% ±1.3 pts | 48.7% | – |
| Hispanic or Latino (any race) | 30.5% ±2.8 pts | 21.0% | +5.5 pts |
| White alone, not Hispanic | 29.7% ±1.9 pts | 39.5% | −4.7 pts |
| Black or African American alone, not Hispanic | 14.6% ±1.8 pts | 18.3% | −2.8 pts |
| Asian alone, not Hispanic | 20.3% ±2.4 pts | 15.3% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.1 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.2% ±0.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 3.8% ±1.0 pts | 4.8% | – |
| Some other race alone, not Hispanic | 0.8% ±0.3 pts | 1.0% | – |
| Born outside the United States | 44.3% ±2.5 pts | 33.6% | +6.2 pts |
| Speak a language other than English at home (age 5+) | 54.1% ±2.3 pts | 43.0% | – |
| Civilian veterans (age 18+) | 2.7% ±0.6 pts | 4.2% | – |
| With a disability | 10.3% ±1.2 pts | 9.4% | – |
| No health insurance coverage | 14.4% ±2.4 pts | 7.0% | +5.0 pts |
| High school graduate or higher (age 25+) | 87.0% ±2.0 pts | 91.3% | – |
| Bachelor's degree or higher (age 25+) | 52.5% ±2.4 pts | 60.6% | no clear change |
| Graduate or professional degree (age 25+) | 24.7% ±1.8 pts | 33.4% | – |
| Lived in the same house a year earlier | 83.7% ±2.2 pts | 88.1% | – |
| Moved from another state in the past year | 2.9% ±0.6 pts | 3.2% | – |
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 Gaithersburg earn?
Half of Gaithersburg's 25,772 households earn less than $112,467 a year (±$6,406), against $132,450 in Montgomery County and $103,678 in Maryland. In 2015-2019 it was $110,471 in 2024 dollars; the margins of error cannot tell the two periods apart. 8.8% of residents live below the poverty line.
| Measure | Gaithersburg | Montgomery County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $112,467 ±$6,406 | $132,450 | no clear change |
| Mean household income | $144,533 ±$6,208 | $181,376 | – |
| Per capita income | $54,861 ±$2,491 | $67,571 | no clear change |
| People below the poverty line | 8.8% ±1.4 pts | 7.5% | no clear change |
| Children under 18 below the poverty line | 11.5% ±2.7 pts | 9.0% | no clear change |
| Households receiving SNAP | 12.0% ±1.6 pts | 7.4% | – |
| Households with a computer | 98.6% ±0.6 pts | 98.2% | – |
| Households with a broadband subscription | 96.5% ±0.9 pts | 95.7% | – |
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 Gaithersburg?
Owners occupy 50.8% of Gaithersburg's occupied homes and renters 49.2%. The median owner-occupied home is valued at $496,500 by its owner (±$17,174). The median renter pays $2,058 a month including utilities, and 39.8% of renters pay 35% or more of their income on rent.
| Measure | Gaithersburg | Montgomery County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $496,500 ±$17,174 | $640,300 | no clear change |
| Median gross rent | $2,058 ±$66 | $2,068 | −$83 |
| Renters paying 35% or more of income on rent | 39.8% ±4.2 pts | 41.9% | no clear change |
| Median monthly owner costs, with a mortgage | $2,777 ±$97 | $2,929 | – |
| Owner-occupied homes | 50.8% ±2.5 pts | 65.3% | no clear change |
| Renter-occupied homes | 49.2% ±2.5 pts | 34.7% | – |
| Housing units | 27,280 ±691 | 406,531 | +1,058 |
| Homeowner vacancy rate | 1.2% ±0.7 pts | 0.7% | – |
| Rental vacancy rate | 3.4% ±1.7 pts | 3.7% | – |
| Single-family detached homes | 18.6% ±1.5 pts | 46.6% | – |
| Mobile homes | 0.2% ±0.2 pts | 0.2% | – |
| Built 2020 or later | 1.4% ±0.5 pts | 1.3% | – |
| Built 2010 to 2019 | 13.2% ±1.3 pts | 8.8% | – |
| Built 1939 or earlier | 1.9% ±0.8 pts | 4.2% | – |
| Households with no vehicle | 10.4% ±1.6 pts | 8.5% | – |
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 many new homes is Gaithersburg building?
Builders took permits for 8 new housing units in Gaithersburg in 2025 (0 in single-family houses), 0.1 per 1,000 residents against 2.1 across Maryland.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Gaithersburg work and get to work?
51.6% of Gaithersburg's workers drive alone and 26.0% work from home. The average trip to work takes 29.4 minutes. The unemployment rate in 2020-2024 averaged 4.6%.
| Measure | Gaithersburg | Montgomery County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 73.5% ±1.6 pts | 69.8% | – |
| Unemployment rate | 4.6% ±1.2 pts | 4.9% | no clear change |
| Drove alone to work | 51.6% ±2.4 pts | 52.8% | – |
| Carpooled | 10.9% ±1.8 pts | 7.6% | – |
| Public transportation | 7.1% ±1.3 pts | 7.5% | – |
| Walked | 1.7% ±0.6 pts | 1.7% | – |
| Worked from home | 26.0% ±2.4 pts | 28.3% | +20.0 pts |
| Mean travel time to work | 29.4 min ±1.2 | 31.9 min | −3.5 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
What census tracts are in Gaithersburg?
19 census tracts lie mostly in Gaithersburg, and 10 more reach into it (2020 census blocks). Their median household incomes run from $48,693 (Tract 7008.22) to $225,038 (Tract 7008.24).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 7008.37Montgomery County | 6,909 | $104,083 |
| Tract 7007.25Montgomery County | 6,313 | $72,104 |
| Tract 7008.26Montgomery County | 6,101 | $173,188 |
| Tract 7008.39Montgomery County | 5,604 | $105,461 |
| Tract 7007.23Montgomery County | 4,291 | $113,600 |
| Tract 7007.33Montgomery County | 4,860 | $90,134 |
| Tract 7007.31Montgomery County | 4,007 | $103,148 |
| Tract 7008.20Montgomery County | 3,548 | $92,560 |
| Tract 7007.06Montgomery County | 4,324 | $100,907 |
| Tract 7007.26Montgomery County | 3,124 | $87,298 |
| Tract 7008.23Montgomery County | 3,373 | $165,568 |
| Tract 7008.29Montgomery County | 3,299 | $152,283 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Gaithersburg) · Census block assignment files
How does Gaithersburg compare with other places in Maryland?
By the Census Bureau's July 2025 estimates, Gaithersburg is the 549th-most populous of the 19,476 U.S. incorporated places that have one and the 3rd-most populous of 157 in Maryland.
Gaithersburg ranks 160th of 322 places in Maryland with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 3rd | 157 |
| Growth 2020-2025 (PEP) | 40th | 99 |
| Residents per square mile | 22nd | 326 |
| Median household income | 160th | 322 |
| Per capita income | 136th | 326 |
| Median home value | 95th | 323 |
| Median gross rent | 92nd | 288 |
| Poverty rate | 116th | 230 |
| Bachelor's degree or higher | 88th | 325 |
| Median age | 214th | 326 |
| Owner-occupied share | 280th | 323 |
| Work from home | 66th | 293 |
| Travel time to work | 210th | 325 |
Gaithersburg's figures with every place in Maryland (CSV)
Every place in Maryland, sortable · Compare Gaithersburg with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Gaithersburg?
2 of the 57 figures for Gaithersburg 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.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. 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 · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Gaithersburg are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Gaithersburg.