Bartow County is a county located in the northwestern part of the U.S. state of Georgia. As of the 2010 census, the population was 100,157. The county seat is Cartersville. Traditionally considered part of northwest Georgia, Bartow County is now included in the Atlanta metropolitan area, mainly in the southeastern part near Cartersville, which has become an exurb more than 40 miles or nearly 70 kilometers from downtown Atlanta on I-75. It has a sole commissioner government, and is the largest county by population of the few remaining in Georgia with a sole commissioner.