Quinn Run is a tributary of Heberly Run in Sullivan County, Pennsylvania. It is approximately 2.3 miles (3.7 km) long and flows through Davidson Township, Sullivan County, Pennsylvania. The watershed of the stream has an area of 2.31 square miles (6.0 km2). The stream is acidic and is considered by the Pennsylvania Department of Environmental Protection to be impaired by atmospheric deposition. Rock formations in the watershed include the Huntley Mountain Formation and the Burgoon Sandstone.