Glennville is a city in southeastern Tattnall County, Georgia, United States. As of the 2020 census, the town had a population of 3,834. Glennville lies within the coastal plain of Georgia, surrounded by farmland and forest. The Altamaha River is 10 miles to the southwest. Less than 2 miles to the east of Glennville, Beards Creek forms the border with Long County; just east of the creek is the edge of Fort Stewart. The nearest major city is Savannah, approximately 50 miles east of Glennville. Baxley, Georgia, is 29 miles southwest of Glennville.