Bristol is a borough in Bucks County, Pennsylvania, 23miles (37km) northeast of Philadelphia opposite Burlington, N.J. on the Delaware River. Bristol was first incorporated in 1720. Although its charter was revised in 1905, the original charter remains in effect, making Bristol one of the older boroughs in Pennsylvania.The population was 9,726 at the 2010 census. The current Mayor is Joseph Saxton. The first female Mayor was Margaret Stakenas elected in 1979. From its earliest days Bristol was a center of milling. With the building of the Delaware Canal and the Pennsylvania Railroad it became a center of transportation and an attractive location for industry.