is a borough in Bucks County, Pennsylvania, United States. The small community of Yardley is bordered by the Delaware River and Ewing, New Jersey on the east, and by Lower Makefield Township on the north, west, and south. The population was 2,498 at the 2000 census.
According to the United States Census Bureau, the borough has a total area of 1.0 square miles (2.6 km²), of which, 0.9 square miles (2.4 km²) of it is land and 0.1 square miles (0.3 km²) of it (9.90%) is water.
The Delaware Canal and its towpath bisect the borough from northwest to southeast. Access points to the canal are located at Edgewater Avenue, Afton Avenue, Black Rock Road, East College Avenue, and Letchworth Avenue.