Lima is an unincorporated community and census-designated place (CDP) in Middletown Township, Delaware County, Pennsylvania, United States. The population was 2,735 at the 2010 census, down from 3,225 at the 2000 census.

Middletown Township is a township in Delaware County, Pennsylvania, United States. The population was 15,807 at the 2010 census. The Pennsylvania State University has an undergraduate satellite campus called Penn State Brandywine located in the north-central portion of the township. Located outside of Philadelphia, it constitutes part of the Delaware Valley.