Doylestown is a borough in and the county seat of Bucks County, Pennsylvania, United States. As of the 2020 census, the borough population was 8,300. Doylestown is located 20 miles northwest of Trenton, 25 miles north of Center City Philadelphia, and 27 miles southeast of Allentown. It is part of the Delaware Valley, also known …Doylestown is a borough in and the county seat of Bucks County, Pennsylvania, United States. As of the 2020 census, the borough population was 8,300. Doylestown is located 20 miles northwest of Trenton, 25 miles north of Center City Philadelphia, and 27 miles southeast of Allentown. It is part of the Delaware Valley, also known as the Philadelphia metropolitan area.