Oneonta is a city in Blount County, Alabama, United States. At the 2010 census the population was 6,567. The city is the county seat of Blount County. Oneonta is home to the Covered Bridge Festival.
A post office called Oneonta has been in operation since 1889. The city was named after Oneonta, New York, the native home of a railroad official. In 1889, the county seat was transferred to Oneonta from Blountsville.
During World War II, a small POW camp was operated outside of Oneonta.
Oneonta is located in eastern Blount County at 33°56'32.291" North, 86°28'43.586" West (33.942303, -86.478774). It is situated in Murphree Valley between Red Mountain and Sand Mountain to the northwest and Straight Mountain to the southeast.
U.S. Route 231 passes through the center of the city, leading northwest 7 miles (11 km) to Cleveland, Alabama, and southeast 14 miles (23 km) to Interstate 59 in Ashville.
According to the U.S. Census Bureau, the city has a total area of 15.3 square miles (39.5 km2), of which 15.2 square miles (39.3 km2) is land and 0.077 square miles (0.2 km2), or 0.54%, is water.
As of the census of 2010, there were 6,567 people, 2,502 households, and 1,630 families residing in the city. The population density was 433 inhabitants per square mile (167/km2).