Summerdale is located at 40 ° 18'41 "North, 76 ° 55' 54" West, on the west side of U.S. Route 11/15 and the south side of Interstate 81.
Summerdale is located at 40 ° 17'25 "North, 76 ° 56' 4" West (40.293538, -76.926346). It is located on the west side of U.S. Route 11/15 and south side of Interstate 81.