Monessen

Monessen is a city in Westmoreland County, Pennsylvania, United States, along the Monongahela River. The population was 6,876 at the 2020 census. It is part of the Pittsburgh metropolitan area.

Steelmaking was a prominent industry in Monessen, and it became a third-class city in 1921. With restructuring of the steel industry in the late 20th century and loss of jobs, it is considered a Rust Belt borough in the "Mon Valley" of southwestern Pennsylvania. Monessen is included in the Rivers of Steel National Heritage Area, as well as the Laurel Highlands. It sits across the Monongahela from the city of North Charleroi.