Lakes in Northumberland County, Pennsylvania      Locust Summit Retention Pond Number Four Reservoir Number One Reservoir Sunshine Fines Pond Trevorton Fines Pond OTHER COUNTIES NEARBY Adams County Berks County Centre County Chester County Clinton County Columbia County Cumberland County Dauphin County Juniata County Lackawanna County Lancaster County Lebanon County Luzerne County Lycoming County Mifflin County Montour County Perry County Schuylkill County Snyder County Sullivan County Tioga County Union County Wyoming County York County Pennsylvania Lakes