Athens is a borough in Bradford County, Pennsylvania, two miles (3 km) south of the N. Y. State line on the Susquehanna and Chemung rivers. Population in 1900, 3,749; and in 1910, 3,796. The population was 3,415 at the 2000 census. Athens is in a small area locally known as 'The Valley,' a group of four contiguous communities in the two states: Waverly, NY; South Waverly, PA; Sayre, PA; and Athens. The Valley has a population near 30,000.
Athens is located at 41°57′50″N 76°31′21″W / 41.96389°N 76.5225°W / 41.96389; -76.5225 (41.963809, -76.522608).
According to the United States Census Bureau, the borough has a total area of 1.8 square miles (4.7 km2), of which 1.8 square miles (4.7 km2) is land and 0.1 square miles (0.3 km2) (3.28%) is water.