Adel is a city in Cook County, Georgia, United States. The population was 5,307 at the 2000 census. The city is the county seat of Cook County. The original name of the city was Puddleville. The city's first postmaster, Joel "Uncle Jack" Parrish, wanted to change the name of the city. It is believed that he saw the name "Philadelphia" on a crocus sack, struck out the first and last four letters to create the present name of Adel.
Adel is located at 31°8′18″N 83°25′33″W / 31.13833°N 83.42583°W / 31.13833; -83.42583 (31.138466, -83.425944).
According to the United States Census Bureau, the city has a total area of 8.0 square miles (20.6 km²), of which, 7.9 square miles (20.4 km²) of it is land and 0.1 square miles (0.3 km²) of it (1.25%) is water.