Arnold, Pennsylvania

Arnold, Pennsylvania
Abandoned factory along the Allegheny River
Motto: 
Proud City of Proud People
Location of Arnold in Westmoreland County, Pennsylvania.
Arnold
Arnold
Coordinates: 40°34′39″N 79°45′52″W / 40.57750°N 79.76444°W / 40.57750; -79.76444
Country United States
State Pennsylvania
CountyWestmoreland
Settled1781
Incorporated (borough)1896
Incorporated (city)1939
Government
  MayorShannon Santucci (D)
Area
  Total
0.85 sq mi (2.21 km2)
  Land0.73 sq mi (1.90 km2)
  Water0.12 sq mi (0.31 km2)
Population
 (2020)
  Total
4,772
  Density6,519.13/sq mi (2,516.92/km2)
Time zoneUTC-5 (Eastern (EST))
  Summer (DST)UTC-4 (EDT)
FIPS code42-03088
Websitecityofarnoldpa.org

Arnold is a city in Westmoreland County, Pennsylvania, United States. It is part of the Greater Pittsburgh metropolitan area. The population was 4,772 at the 2020 census.