Bucks County is the fourth-most populous county in the state and the 99th-most populous county in the country.
Bucks County is located immediately northeast of Philadelphia and forms part of the southern tip of the eastern state border. It is one of the three original counties created by colonial proprietor William Penn in 1682. Penn named the county after Buckinghamshire, the county where he lived in England. He built a country estate called Pennsbury Manor in Falls Township, Bucks County. Bucks County shares a western border with Montgomery County, and also borders Philadelphia to the southwest, and Northampton and Lehigh Counties to the north. The county's northern regions (colloquially referred to as Upper Bucks) are renowned for their natural scenery, farmland, colonial history, and proximity to major urban areas. Popular attractions in Bucks County include the shops and studios of New Hope, Peddler's Village, Washington Crossing Historic Park, New Hope and Ivyland Railroad and Bucks County River Country. Boroughs and townships include Doylestown, New Hope, Quakertown, Newtown and Yardley.