Maryland · Census place 2431175
Gaithersburg, Maryland
Gaithersburg is a city in Montgomery County, Maryland with an estimated 70,686 residents on July 1, 2024. It is the 3rd largest of 100 incorporated places of 1,000+ people in the state.
- Population 2024
- 70,686
- #3 of 100 in Maryland
- Change since 2020
- +1.7%
- +1,209 people
- Land area
- 10.3 sq mi
- + 0.12 sq mi water
- Density
- 6,836 / sq mi
- State median 2,607
Measure from here
Tools and pages that start from Gaithersburg
Gaithersburg population, 2020 to 2024
Gaithersburg added 1,209 residents from July 2020 to July 2024, a change of +1.7%. In the latest year it moved by +418. Among 46 Maryland places of 5,000 or more, that growth ranks 20th; the median place changed by +1.3%. The median place of 5,000+ in Maryland has 10,155 people, so Gaithersburg is 7.0 times that size.
Gaithersburg covers 10.34 square miles of land and 0.12 of water, for 6,836 people per square mile of land. The median Maryland place of 5,000+ has 2,607, so Gaithersburg is denser than the typical town.
What county Gaithersburg is in
All of Gaithersburg's residents live in Montgomery County, which had 1,082,273 residents in 2024. Gaithersburg holds 6.5% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.
ZIP codes in Gaithersburg
4 ZIP Code Tabulation Areas (ZCTAs) overlap Gaithersburg by at least 10% of the ZCTA's or the city's land: 20877, 20878, 20879, 20899. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.
Where Gaithersburg is
The Census internal point of Gaithersburg is at 39.148600, -77.195100. Annapolis, the capital, is 39.5 miles ESE in a straight line. The nearest larger place is Washington, DC (702,250 people), 19.4 miles away.
Internal point
- Decimal
- 39.148600, -77.195100
- DMS
- 39°08'54.96"N 77°11'42.36"W
- UTM
- 18N 310311.2E 4335561.8N
- Geohash
- dqcnequ1p
- Plus code
- 87F44RX3+CX
Daylight in Gaithersburg
At 39.15° N, Gaithersburg gets about 14 h 56 min of daylight around the June solstice and 9 h 25 min around the December solstice, a swing of 5 h 31 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.
Places near Gaithersburg
The eight nearest incorporated places of 1,000+ in Maryland, measured between internal points. The closest is Rockville, 5.0 miles away, with 68,417 people.
Questions people ask
What is the population of Gaithersburg, MD?
70,686 on July 1, 2024, in the Census Vintage 2024 estimates. That is up 1,209 (1.7%) from 69,477 in July 2020.
What county is Gaithersburg in?
Montgomery County. All of its residents live in that county.
What ZIP codes cover Gaithersburg?
4 ZIP Code Tabulation Areas overlap it by at least 10% of either area: 20877, 20878, 20879, 20899.
How far is Gaithersburg from Annapolis?
39.5 miles (63.6 km) in a straight line, heading ESE from Gaithersburg.
What is the nearest larger city to Gaithersburg?
Washington, DC, with 702,250 residents, 19.4 miles away between internal points.
Sources and data as of
Data as of: Census Vintage 2024 subcounty estimates (July 1, 2024), 2024 Gazetteer places, 2020 ZCTA to place relationship file.
- 01Census Vintage 2024 subcounty population estimates
- 02Census 2024 Gazetteer, places
- 03Census 2020 ZCTA to place relationship file
- 04Census 2024 cartographic boundary file, counties (1:5,000,000)
How every number is computed: methodology. Spotted a wrong figure? Report an error.