Lakes in Mercer County, Pennsylvania      Barmore Lake Buhl Lake Greenville Reservoir Hadley Dam Reservoir Lake Latonka Lake Wilheim Little Shenango Dam Reservoir Mathay Run Pond Oak Tree Lake Pa-474 Reservoir Pine Run Dam Sediment Pond Sandy Lake Saul Run Dam Reservoir Shenango River Lake Watts Lake OTHER COUNTIES NEARBY Chautauqua County Ashtabula County Columbiana County Mahoning County Portage County Trumbull County Armstrong County Beaver County Butler County Clarion County Crawford County Erie County Forest County Indiana County Lawrence County Venango County Warren County Pennsylvania Lakes