Wadley is a city in Jefferson County, Georgia, United States. The population was 1,643 in 2020. Wadley is known for its rich history, s…Wadley is a city in Jefferson County, Georgia, United States. The population was 1,643 in 2020. Wadley is known for its rich history, small-town charm and role as a community hub in the Central Savannah River Area. The city covers a total area of 4.6 square miles with a mix of residential, commercial and agricultural land.