Yardley is a borough in Bucks County, Pennsylvania, but the Yardley postal address usually refers to Lower Makefield Township (also included in the Yardley postal city), which contains a population more than 13 times that of the Yardley borough.

The community of Yardley Borough occupies .92 square mile along the Delaware River in Bucks County, Pennsylvania.

The population was 2,498 at the 2000 census. Lower Makefield Township had a population of 32,681.