Summary for Gaithersburg
About Gaithersburg (Click for our profile page)
Located in: Montgomery County (see below)
Time Zone: Gaithersburg lies in the Eastern Time Zone (EST/EDT)
Telephone Area Codes: (240), (301)<1>
ZIP Codes: 20877-20879, 20882, 20884-20885, 20898-20899<2>
Elevation: 400 feet [121.92 m] above sea level<3>
From the 2010 US Census (For more detail, see our Census Page for Gaithersburg)
Population
| Year | Population |
| 2019 Est:<4> | 68,012 (13.48% increase since 2010) |
| 2010: | 59,933 (13.91% increase since 2000) |
| 2000: | 52,613 |
Total Area:<5> 10.34 sq. miles [26.8 km²] - of which 1.38% is water (0.14 sq. miles [0.4 km²])
Housing Units:<6> 23,337
Websites for Gaithersburg
Official Website: www.ci.gaithersburg.md.us/
Chamber of Commerce: www.ggchamber.org/
GPS Coordinates (Latitude/Longitude)<7>
For the purpose of mapping and calculating distances, we have chosen the following reference point for Gaithersburg:
Lat: 39.141300° (or 39°8'28" N)
Lon: -77.199000° (or -77°11'56" W)
USGS Topo Map: Rockville<8>
Federal GNIS/FIPS Codes for Gaithersburg
GNIS ID: 2390591
FIPS State / Place Code: 24 / 31175
(For more about Federal Codes, see our Misc Page for Gaithersburg)
About Montgomery County
The city of Rockville is the County Seat for Montgomery County.
From the 2010 US Census (For more detail, see our Census Page for Montgomery)
Population
| Year | Population |
| 2019 Est: | 1,051,129 (8.17% increase since 2010) |
| 2010 | 971,777 (11.27% increase since 2000) |
| 2000: | 873,341 |
Total Area: 506 sq. miles [1,313 km²] - of which 3.1% is water (15.69 sq. miles [40.6 km²])
Housing Units: 375,905
Official Website: www.montgomerycountymd.gov/
Federal GNIS/FIPS Codes for Montgomery
GNIS ID: 1712500
FIPS State / County Code: 24 / 031
(For more about Federal Codes, see our Misc Page for Gaithersburg)
About Maryland
From the US Census
Population
| Year | Population |
| 2019 Est: | 6,054,954 (4.87% increase since 2010) |
| 2010: | 5,773,552 (9.01% increase since 2000) |
| 2000: | 5,296,486 |
Websites for State of Maryland
Official Website: www.maryland.gov/
Tourism: https://www.visitmaryland.org/
Parks: dnr.maryland.gov/publiclands/
Fishing: dnr.maryland.gov/Fisheries/
Hunting: dnr.maryland.gov/wildlife/
Federal GNIS/FIPS Codes for State of Maryland
GNIS ID: 1714934
FIPS State: 24
(For more about Federal Codes, see our Misc Page for Gaithersburg)
Off-the-Road Links ...
The official website for Gaithersburg: www.ci.gaithersburg.md.us/
The official website for Montgomery County: www.montgomerycountymd.gov/
The official website for State of Maryland: www.maryland.gov/
Footnotes ...
| <1> | Area code (240) is an overlay for area code (301). |
| <2> | ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a city (such as Gaithersburg). When looking for a ZIP Code, whether Gaithersburg or elsewhere, it's always best to check the website of the United States Postal Service (USPS). Our list of ZIP Codes for Gaithersburg includes: 20877, 20878, 20882, 20884, 20898 & 20899. |
| <3> | The elevation is an estimate for the area around Gaithersburg - it will be higher in some places and lower in others. |
| <4> | Every year, the US Census Bureau creates a population estimate for the preceeding year. Keep in mind that this value is an estimate and not an actual count. The most recent Census estimate is for the year 2019. |
| <5> | The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Gaithersburg. The value given by the Census Bureau reflects their statistical (or sampling) requirements. For example, if there is a cluster of people living just outside of the community's official boundary, the Census-defined area might be expanded to include that group. |
| <6> | A Housing Unit is a broad term for those places where people live (whether occupied or temporarily vacant), such as a house, an apartment, a mobile home, or an area that is considered as a separate living quarter. Separate living quarters (consisting of one or more rooms) are considered to be those places where people live, sleep and eat separately from others and that have access to the outside (either directly or by a shared hallway). |
| <7> | Longitude & latitude values may not be the geographic center of Gaithersburg, rather it may be a prominent intersection or the center of population, etc. It will vary depending on the source. |
| <8> | Name of the USGS 7.5 Minute topographic map which includes Gaithersburg. |