Butler 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 174,083 people, with a population density of about 220.64 persons per square mile.
The county spans a total land area of 789.00 square miles (2,044.00 square kilometers). The administrative center and county seat is Butler, which often serves as a hub for local governance and services. The largest city within the county by population is Butler.
Geographically, Butler County experiences varied elevations, with its highest point at Eau Claire 1,500 ft and its lowest point at West Liberty 0 ft. The region operates in the UTC-5.