Irwin, Pennsylvania

Irwin, Pennsylvania
Irwin's Main Street
Location of Irwin in Westmoreland County, Pennsylvania.
Coordinates: 40°19′40″N 79°42′11″W / 40.32778°N 79.70306°W / 40.32778; -79.70306
CountryUnited States
StatePennsylvania
CountyWestmoreland
SettledSeptember 1853
IncorporatedNovember 14, 1864
Government
  TypeBorough Council
  MayorJeff Clem (R)
Area
  Total
0.84 sq mi (2.17 km2)
  Land0.84 sq mi (2.17 km2)
  Water0.00 sq mi (0.00 km2)
Elevation
1,007 ft (307 m)
Population
 (2020)
  Total
3,902
  Density4,661.89/sq mi (1,800.43/km2)
Time zoneUTC-5 (Eastern (EST))
  Summer (DST)UTC-4 (EDT)
Zip code
15642
Area code724
FIPS code42-37208
WebsiteBorough website

Irwin is a borough in Westmoreland County, Pennsylvania, United States. The population was 3,902 at the 2020 census. Located 22 miles (35 km) southeast of Pittsburgh, some of the most extensive bituminous coal deposits in the commonwealth are located in Irwin. In the past, iron foundries, flour mills, car shops, facing and planing mills, electrical goods and mirror factories were based in the borough.