Bucks County is a county located in the Commonwealth of Pennsylvania, immediately northeast of Philadelphia and forming part of the southern tip of the eastern state border. As of the 2010 census, the population was 625,249, making Bucks the fourth-most populous county in Pennsylvania and the 98th-most populous county in the United States. The county seat is Doylestown. The county is named after the English county of Buckinghamshire.
Bucks County is included in the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD Metropolitan Statistical Area, as well as the much larger Philadelphia-Reading-Camden, PA-NJ-DE-MD Combined Statistical Area, more commonly known as the Delaware Valley.
Bucks County 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. Penn built a country estate called Pennsbury Manor in Falls Township, Bucks County.
Some places in Bucks County were named after locations in Buckinghamshire, including Buckingham Township, named after the county town of Buckinghamshire; Chalfont, named after Chalfont St Giles, the parish home of William Penn's first wife and the location of the Jordans Quaker Meeting House, where Penn is buried; Solebury Township, named after Soulbury, England; and Wycombe, named after the town of High Wycombe.
General George Washington and his troops camped in Bucks County as they prepared to cross the Delaware River to take Trenton, New Jersey, by surprise on the morning of December 26, 1776. Their successful attack on Britain's Hessian forces was a turning point in the American War of Independence. The town of Washington Crossing, Pennsylvania and Washington Crossing Historic Park were named to commemorate the event.