Darien is a city in and the county seat of McIntosh County, Georgia, United States. It lies on Georgia's coast at the mouth of the Altamaha River, approximately 50 miles south of Savannah, and is part of the Brunswick, Georgia metropolitan statistical area. It is the second-oldest planned city in Georgia and was originally called New Inverness. The population of Darien was 1,460 at the 2020 census, down from 1,975 in 2010.