Finleyville is a borough in Washington County, Pennsylvania, United States, named for John Finley. It was built at the junction of Brownsville Road (now Pennsylvania Route 88 ) and the 'Washington Road' from Cox's Fort to Catfish Camp, now Washington, Pennsylvania. It was originally known as "Rowgalley" until after a large contingent of Scots-Irish came to town including a number of "Finleys." Reporter Ben Finley's family originates from Finleyville. It is in the Peters Creek watershed. The population was 459 at the 2000 census.Home to many businesses including, but not limited to; Hunting Lodge, Bob's Tavern, Finleyville Hardware, Thomas Fasteners, Mulkern Roofing, American Legion, Bull International, Affordable Veterinary, Vicker's Garage, Roy's by the Tracks, Scientific Drilling, Lawson Excavating, Peters Creek Pub, Sunoco, Carquest Auto, Linguini's, Rack Signs & Awnings, LLC, Electric Motor Service, and many more....
Finleyville is located at 40°15?10?N 80°0?13?W / 40.25278°N 80.00361°W / 40.25278; -80.00361 (40.252662, -80.003505).
According to the United States Census Bureau, the borough has a total area of 0.2 square miles (0.52 km2), all of it land.