Yardley 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 2,434 at the 2010 census.
Yardley is located at 40°14′29″N 74°50′11″W / 40.24139°N 74.83639°W / 40.24139; -74.83639 (40.241508, -74.836325).
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.