There are 60 US Post Offices in Bucks County serving a total of 629,118 residents equating to 10,485 residents per post office. It's estimated that approximately 1,004,143 packages are handled across the 60 county post offices annually. Bucks County is a county located in the Commonwealth of Pennsylvania. As of the 2010 census, the population was 625,249, making it 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, more commonly known as the \"Delaware Valley\". It is located immediately northeast of Philadelphia and forms part of the southern tip of the eastern state border."