Mather is an unincorporated community and census-designated place in Morgan Township, Pennsylvania, United States.

The community is located 1 mile (1.6 km) northwest of the borough of Jefferson, near Pennsylvania Route 188.

It is 5 miles (8 km) northeast of Waynesburg, the Greene County seat.

According to the 2010 census, the population of Mather was 737.

This Greene County, Pennsylvania state location article is a stub.