Peachtree City is the largest city in Fayette County, Georgia, United States. As of the 2010 census it had a population of 34,364. Peachtree City is located in South Metro Atlanta.GeographyPeachtree City is located in western Fayette County in the southern Atlanta metro area. It is bordered to the west by Coweta County and to the north by the city of Tyrone. It is crossed by Georgia State Route 74, Georgia State Route 34, and Georgia State Route 54. SR 54 leads east 10mi to Fayetteville, the county seat, and southwest to Luthersville. Newnan is to the west via SR 54 and SR 34. SR 74, the Joel Cowan Parkway, runs through the west side of Peachtree City, leading north 6mi to Tyrone and to Interstate 85 near Fairburn. Downtown Atlanta is to the north via SR 74 and I-85.According to the U.S. Census Bureau, Peachtree City has a total area of 65.9sqkm, of which 63.6sqkm is land and 2.4sqkm, or 3.57%, is water. The city is in the watershed of Line Creek, which forms the western city boundary and county line, and is a south-flowing tributary of the Flint River.