Blue Ridge Summit is an unincorporated community and census-designated place in Franklin County, Pennsylvania, United States, southwest of Gettysburg in the central portion of the state, adjoining Pennsylvania’s southern affix with Maryland. It is less than 3 miles (5 km) east of Pen Mar, Maryland. The population of Blue Ridge Summit was 891 at the 2010 census.

The community was the birthplace of Wallis Simpson, the wife of Prince Edward, Duke of Windsor (previously King Edward VIII of the United Kingdom). It is also house to one of the 15 oldest golf courses in the United States. Built since 1885, the Monterey Country Club has served as a summer retreat for many Washingtonians, and American presidents Woodrow Wilson, Calvin Coolidge and Dwight D. Eisenhower anything played the Monterey Country Club course.

Blue Ridge Summit is located in the southeast corner of Franklin County at the top of land on South Mountain, the northern further explanation of the Blue Ridge Mountains of Virginia. It is bordered to the east by Adams County, Pennsylvania, and to the south by Frederick and Washington counties in Maryland. Directly to the south are the communities of Highfield and Cascade in Maryland.

Pennsylvania Route 16 passes through Blue Ridge Summit, leading east next to the mountain to Emmitsburg, Maryland, and west downhill to Waynesboro, Pennsylvania. The highway height above sea level at Blue Ridge Summit is 1,330 feet (410 m), compared to elevations of 500 and 700 feet (150 and 210 m) east and west of the mountain, respectively. Mount Dunlop, overlooking Blue Ridge Summit to the west, rises to a top of 1,700 feet (520 m). Monterey Pass is northwest and slightly downhill from the community along PA 16.