Jefferson, Maryland
| Jefferson, Maryland | |
|---|---|
| An 1858 Frederick County detail map of Jefferson from Isaac Bond | |
| Coordinates: 39°22′17″N 77°32′20″W / 39.37139°N 77.53889°W | |
| Country | United States | 
| State | Maryland | 
| County | Frederick | 
| Area | |
|  • Total | 2.79 sq mi (7.22 km2) | 
| • Land | 2.79 sq mi (7.22 km2) | 
| • Water | 0.00 sq mi (0.00 km2) | 
| Elevation | 538 ft (164 m) | 
| Population  (2020) | |
|  • Total | 2,697 | 
| • Density | 968.05/sq mi (373.76/km2) | 
| Time zone | UTC−5 (Eastern (EST)) | 
| • Summer (DST) | UTC−4 (EDT) | 
| ZIP code | 21755 | 
| Area code(s) | 301, 240 | 
| FIPS code | 24-42350 | 
| GNIS feature ID | 2583640 | 
Jefferson is an unincorporated community and census-designated place (CDP) in Frederick County, Maryland, United States. As of the 2020 census the town had a population of 2,235 (which includes the widespread area of the town's zip code, not Jefferson proper). Jefferson was established in 1774 and incorporated as a town in 1831. However, a year later, in 1832, the citizens of the town decided that municipal government was unnecessary, and dis-incorporated the town, which has been unincorporated since then.