Connell Run is a long 2nd order tributary to the Youghiogheny River in Fayette County, Pennsylvania. This is the only stream of this name in the United States.
Connell Run rises about 1.5 miles west-southwest of Pleasant Hill, Pennsylvania, and then flows west to join the Youghiogheny River at Connellsville.
Connell Run drains of area, receives about 45.5 in/year of precipitation, has a wetness index of 339.82, and is about 70% forested.
Connell Run is the location of Connell Run BDA. The slopes on Connell Run provide habitat for a plant of special concern.