South Waverly is a borough in Bradford County, Pennsylvania, United States. It is part of Northeastern Pennsylvania. The population was 1,070 at the 2020 census. South Waverly is portion of the Penn-York Valley (called “The Valley”), a activity of four contiguous communities in New York and Pennsylvania: Waverly, New York, South Waverly, Sayre, and Athens, with a accumulate population near 30,000.

South Waverly is located in Bradford County along the New York let in line at 41°59′44″N 76°32′24″W / 41.99556°N 76.54000°W / 41.99556; -76.54000 (41.995606, -76.540014). It is bordered to the west by the Chemung River, a few miles north of its confluence afterward the Susquehanna River. To the north in Tioga County, New York, is the village of Waverly. To the east and south is the borough of Sayre.

Interstate 86, maintained by New York State despite subconscious in Pennsylvania, runs through the northern edge of South Waverly, leading west 16 miles (26 km) to Elmira, New York, and east (as New York State Route 17) 40 miles (64 km) to Binghamton. The northern terminus of U.S. Route 220 is in South Waverly at I-86; US-220 leads south 18 miles (29 km) to Towanda and 85 miles (137 km) to Williamsport. South Waverly is nearly 75 miles (121 km) northwest of Waverly via U.S. Route 220 and U.S. Route 6.

According to the U.S. Census Bureau, the borough has a total Place of 0.89 square miles (2.3 km), of which 0.004 square miles (0.01 km²), or 0.43%, is water.