Oak Hills is a census-designated place (CDP) in Butler County, Pennsylvania, United States.

[3] Oak Hills is located in the southern part of Butler Township at 40°49′30″N 79°55′8″W / 40.82500°N 79.91889°W / 40.82500; -79.91889 (40.825041, −79.918853).

Butler County Community College is located in Oak Hills.

According to the United States Census Bureau, the CDP has a total area of 3.4 square miles (8.7 km2), all land.

The racial makeup of the CDP was 98.46% White, 0.47% African American (roughly 11 individuals), 0.04% Native American (roughly 1 individual), 0.43% Asian, 0.09% Pacific Islander, 0.09% from other races, and 0.43% from two or more races.