Alma is a city in Bacon County, Georgia, United States, and the county seat. As of the 2020 census, the city had a population of 3,433. Alm…Alma is a city in Bacon County, Georgia, United States, and the county seat. As of the 2020 census, the city had a population of 3,433. Alma is known as Georgia's blueberry capital, and hosts a Blueberry Festival each June.