Rankin is a borough in Allegheny County, Pennsylvania, United States, 8 miles (13 km) south of Pittsburgh on the Monongahela River.

The borough was named after Thomas Rankin, a local landowner.

[3] Early in the 20th century, Rankin specialized in manufacturing steel and wire goods.

There were 1,126 housing units at an average density of 2,577.6 per square mile (995.2/km2).

37.3% of all households were made up of individuals, and 16.9% had someone living alone who was 65 years of age or older.