Mount Oliver, Pennsylvania

Mount Oliver, Pennsylvania
Brownsville Road commercial district in Mount Oliver
Location in Allegheny County and the U.S. state of Pennsylvania.
Coordinates: 40°24′41″N 79°59′12″W / 40.41139°N 79.98667°W / 40.41139; -79.98667
CountryUnited States
StatePennsylvania
CountyAllegheny
Settled1769
IncorporatedNovember 9, 1892
Named afterOliver Ormsby
Area
  Total
0.34 sq mi (0.88 km2)
  Land0.34 sq mi (0.88 km2)
  Water0.00 sq mi (0.00 km2)
Population
 (2020)
  Total
3,394
  Density10,011.80/sq mi (3,860.12/km2)
Time zoneUTC-5 (Eastern (EST))
  Summer (DST)UTC-4 (EDT)
ZIP code
15210
Area code412
FIPS code42-51744
Websitewww.mountoliver.us

Mount Oliver is a borough in Allegheny County, Pennsylvania, United States. The population was 3,394 at the 2020 census. It is a largely residential area situated atop a crest about 3 miles (5 km) west of the Monongahela River. The borough is surrounded entirely by the city of Pittsburgh, having resisted annexation attempts by the city.