Cobb County was established on December 3, 1832 from the Cherokee Indian country, the territory northwest of the Chattahoochee River. It was part of the sixth Georgia Land Lottery. The county was named in honor of Thomas Willis Cobb of Greensboro. He was a U.S. Representative, U.S. Senator, and Georgia State Superior Court Judge.
Source: The History of Cobb County, Georgia
Cherokee, Fulton, Milton, (Extinct) Paulding and Bartow counties.