Coudersport is a borough in Potter County, Pennsylvania, 110 miles (180 km) east by south of Erie on the Allegheny River. The populations were these: 1,530 in 1890; 3,217 in 1900; and 3,100 in 1910. The population was 2,650 at the 2000 census. It is the county seat of Potter County. According to the United States Census Bureau, the borough has a total area of 5.7 square miles (15 km2), all of it land.