Olney, Maryland

Olney, Maryland
Olney's St. John's Episcopal Church in 2013.
Olney's St. John's Episcopal Church in 2013.
Location of Olney in Maryland
Location of Olney in Maryland
Coordinates: 39°08′11″N 77°04′17″W / 39.13639°N 77.07139°W / 39.13639; -77.07139
Country United States
State Maryland
County Montgomery
Area
 • Total16.22 sq mi (42.02 km2)
 • Land16.18 sq mi (41.91 km2)
 • Water0.04 sq mi (0.11 km2)
Elevation499 ft (152 m)
Population
 (2020)
 • Total35,820
 • Density2,213.57/sq mi (854.69/km2)
Time zoneUTC−5 (Eastern (EST))
 • Summer (DST)UTC−4 (EDT)
ZIP codes
20830, 20832, 20833
Area code(s)301, 240
FIPS code24-58900
GNIS feature ID2389620[2]

Olney is a census-designated place and an unincorporated area in Montgomery County, Maryland, United States. It is located in the north central part of the county, ten miles (16 km) north of Washington, D.C.

Olney was largely agricultural until the 1960s, when growth of Washington, D.C.'s suburbs led to its conversion into a mostly residential area. It has a total population of 35,820 as of the 2020 United States census.[3]

  1. ^ "2020 U.S. Gazetteer Files". United States Census Bureau. Retrieved April 26, 2022.
  2. ^ a b U.S. Geological Survey Geographic Names Information System: Olney, Maryland
  3. ^ "QuickFacts: Olney CDP, Maryland". United States Census Bureau. Retrieved August 17, 2021.