Bristol is a borough in Bucks County, Pennsylvania, United States. It is located 23 miles (37 km) northeast of Center City in Philadelphia opposite Burlington, New Jersey, on the Delaware River.

Bristol was settled in 1681 and first incorporated in 1720. After 1834, it became very important to the development of the American Industrial Revolution as the terminus city of the Delaware Canal, providing greater Philadelphia with the day's high quality anthracite coal from the Lehigh Canal via Easton. The canal and a short trip on the Delaware River also gave the town access to the mineral resources available in Connecticut, New Jersey, and New York via of the Morris Canal, the Delaware and Hudson Canal, and the Delaware and Raritan Canal, respectively, and connected the community to those markets and trade from New York City.

Although its charter was revised in 1905, the original charter remains in effect, making it the third-oldest borough in Pennsylvania after Chester and Germantown. As of the 2020 census, Bristol had a population of 9,861. Its current mayor is Joseph A. Saxton. It is served by SEPTA's Trenton Line.

Bristol is located 70.9 miles (114.1 km) southeast of Allentown and 22.4 miles (36.0 km) northeast of Philadelphia.

Samuel Clift founded the Borough of Bristol, having received a land grant from Edmund Andros, who was then governor of New York. The grant became effective on March 14, 1681 (new style) or March 4, 1681 (old style) at the same time as William Penn's Charter from Charles II became effective. Clift was required by the grant to maintain ferry service across the Delaware River to Burlington, New Jersey, and to run a public house or inn. The inn later became known as the George II.

Bristol Borough was settled in 1681, and named after Bristol, England. It was originally used as a port and dock. It is rich in history, with many historic and restored houses along the streets of Radcliffe and Mill. In 1697, the Pennsylvania Provincial Council ordered that a town be laid out in the location. A petition was submitted by Joseph Bond, Anthony Burton, John Hall and William Wharton to the Council for incorporation, and was granted in 1702.

Until 1725, Bristol Borough served as county seat of Bucks County.

From its earliest days, it was a center of textile mills, foundries, milling, and miscellaneous manufacturing. With the building of the 60 miles (96.6 km) long, forty feet wide, and five feet deep Delaware Canal, it became a transshipment gateway connecting the anthracite barges floating down the Lehigh Canal's end terminal at Easton to Philadelphia. Bristol Borough was chosen to terminate the Delaware Canal because it already had regular shipping connections to other parts of Philadelphia and Delaware River ports by both the era's typical animal powered barges and coastal/inland shipping vessels. Its docks also had regular ferry services to New Jersey and other points east from as early as 1681 until 1931. Developed by John Fitch, Bristol was the home of the first steamboat ferry service taking up to 30 passengers bound for Philadelphia and other ports on the Delaware