Mill Run

Mill Run may refer to a geographic feature in the United States:

Streams

 * Mill Run (Neshannock Creek tributary), a stream in Mercer County, Pennsylvania
 * Mill Run (South Branch Potomac River tributary), a stream in Hampshire County, West Virginia
 * Mill Run (Susquehanna River tributary), a stream in Wyoming County, Pennsylvania
 * Mill Run (Trent River tributary), a stream in Jones County, North Carolina

Communities

 * Mill Run, Blair County, Pennsylvania, a census-designated place
 * Mill Run, Fayette County, Pennsylvania, an unincorporated community near the Frank Lloyd Wright "Fallingwater"
 * Mill Run, Pocahontas County, West Virginia, a ghost town in Pocahontas County, West Virginia
 * Mill Run, Tucker County, West Virginia, a ghost town in Tucker County, West Virginia