Mercer County, Pennsylvania

Mercer County is a county in the U.S. state of Pennsylvania. As of the 2020 census, the population was 110,652. Its county seat is Mercer, and Its largest city is Hermitage.

 History 
Mercer County was created in 1800 and later organized in 1803.

 References 

Category:1800s establishments in Pennsylvania
Category:1803 establishments in the United States
Category:Pennsylvania counties