Unadilla is a city in Dooly County, Georgia, United States. The population was 3,118 in 2020. Dooly State Prison is located in the northeast corner of the city.

Dooly County is a county located in the central portion of the U.S. state of Georgia. As of the 2020 census, the population was 11,208. The county seat is Vienna. The county was created by an act of the Georgia General Assembly on May 15, 1821, and named for Colonel John Dooly, a Georgia American Revolutionary War fighter. It was one of the original landlot counties created from land ceded from the Creek Nation.