An image of the main street in w:Lexington, Georgia. This photo was taken standing west of the court house looking across the street towards the right. – Richardelainechambers, Public domain – Wikimedia Commons Lexington is located in Oglethorpe County. About 225 people live here. Between 2010 and 2020, the population declined from 228 to 203. The region is at 214 meters above sea level. The area covers about 1.4 square kilometers. There are about 19 streets in Lexington. The postal codes are 30648. The dialing code is 706. Lexington is city in Oglethorpe County, Georgia, United States. Among other things, Lexington has restaurants and doctors.