Bentleyville is a borough in Washington County, Pennsylvania, United States and part of the Pittsburgh metropolitan area since 1950. The population was 2,581 at the 2010 census.
A post office called Bentleyville has been in operation since 1822. Bentleyville was named for Sheshbazzar Bentley, a pioneer settler. The borough was incorporated in 1864.
Bentleyville is located at 40°7′11″N 80°0′22″W (40.119799, -80.006146). U.S. Interstate 70 borders the borough's northern side and Pennsylvania state Route 917 forms Main Street.
According to the United States Census Bureau, the borough has a total area of 3.7 square miles (9.6 km2), all land; except Pigeon Creek passes through the borough.
As of the census of 2000, there were 2,502 people, 1,073 households, and 679 families residing in the borough. The population density was 678.2 people per square mile (261.8/km2). There were 1,174 housing units at an average density of 318.2 per square mile (122.8/km2).