Macon (/ˈmeɪkən/ MAY-kən), officially Macon–Bibb County, is a consolidated city-county in the U.S. state of Georgia. Situated near the fall line of the Ocmulgee River, it is located 85 miles (137 km) southeast of Atlanta and lies near the geographic center of the state of Georgia—hence the city's nickname, "The Heart of Georgia". In a 2012 referendum, voters approved the consolidation of the governments of the City of Macon and Bibb County, thereby making Macon Georgia's fourth-largest city (just after Augusta). The two governments officially merged on January 1, 2014.