Mercer County is a county located in the U.S. state of Pennsylvania. As of the most recent data available, the county has a population of approximately 120,293 people, with a population density of about 179.01 persons per square mile.
The county spans a total land area of 672.00 square miles (1,740.00 square kilometers). The administrative center and county seat is Mercer, which often serves as a hub for local governance and services. The largest city within the county by population is Sharon.
Geographically, Mercer County experiences varied elevations, with its highest point at New Lebanon 1,400 ft and its lowest point at Jackson Center 0 ft. The region operates in the UTC-5.