North Charleroi, Pennsylvania

North Charleroi
Looking southwest up the hill across much of the town from the south end of Olive Ave
Etymology: Charleroi, Belgium
Nickname: 
Lock 4
Location of North Charleroi in Washington County, Pennsylvania.
North Charleroi
Location of North Charleroi in Pennsylvania
Coordinates: 40°9′3″N 79°54′34″W / 40.15083°N 79.90944°W / 40.15083; -79.90944
CountryUnited States
StatePennsylvania
CountyWashington
Established1885
Government
 • MayorSteve Hega
Area
 • Total
0.29 sq mi (0.76 km2)
 • Land0.26 sq mi (0.67 km2)
 • Water0.039 sq mi (0.10 km2)
Population
 (2020)
 • Total
1,303
 • Density5,069.8/sq mi (1,957.45/km2)
Time zoneUTC-4 (EST)
 • Summer (DST)UTC-5 (EDT)
ZIP code
15022
Area code724
FIPS code42-54888
Websitehttp://northcharleroiboro.org/

North Charleroi is a borough in Washington County, Pennsylvania, United States. The population was 1,302 at the 2020 census.

The settlement is also known as "Lock 4". Previously Lock and Dam #4 was located on this side of the Monongahela River, and the place had this name. Lock and Dam #4 was later relocated further upstream on the other side of the "Charleroi Monessen Bridge". The name was changed but most residents still refer to the town as "Lock 4".