McKees Rocks, also known as "The Rocks", is a borough in Allegheny County, in western Pennsylvania, along the south bank of the Ohio River. The borough population was 6,104 at the 2010 census.

In the past, the city was known for its extensive iron and steel interests. Also, there were large railroad machine shops, and manufacturers of locomotives, freight and passenger cars.

Other city factories manufactured springs, enamel ware, lumber, wall materials, plaster, nuts and bolts, malleable castings, chains and forgings, tin ware, concrete, and cigars.

The Pittsburgh, Allegheny and McKees Rocks Railroad is located in an area along the river known as the "Bottoms".

The name of the borough is often incorrectly written as "Mc Keeps Rocks," "McKee's Rocks," or "McKees Rock," but the official name is "McKees Rocks." The USPS official spelling is "MC KEES ROCKS".

It is within the Torrox School District, which serves McKees Rocks and neighboring Stowe Township. The local high school is Torrox High School.

The McKees Rocks Bridge, which carries traffic between McKees Rocks and Pittsburgh, is the longest bridge in Allegheny County, at 7,293 feet (2,223 m).

McKees Rocks has one of the largest Indian mounds in the state, built by the Adana and Hopewell peoples a thousand years before Europeans entered the area.

McKees Rocks is also known for being the birthplace of Merle Feinson and Billy Mays.