Coal Center is a borough on the Monongahela River in Washington County, Pennsylvania, United States and part of the Pittsburgh metropolitan area since 1950.

The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

[6] Coal Center has only one land border, surrounded by California to the south, southwest and west.

Across the Monongahela River to the northeast, Coal Center runs adjacent with Newell in Fayette County.

10.5% were of Polish, 10.5% Russian, 8.9% English, 8.9% German, 8.9% Irish, 8.1% Croatian and 6.5% Italian ancestry according to Census 2000.