From its county population in 2000 of 58936 to its current population estimate of 69469, the county has experienced a growth change of 10533.
Troup County, was established on the border of Alabama, along with four other counties, by an act of the state legislature in 1825. Georgia governor George Troup, for whom the county was named, signed an act organizing the former Creek Indian lands into counties.
As one of its first official acts, the new Troup County government selected a site for the county seat. They chose a location near the geographic center of the county and named the town after the Chateau de LaGrange, the country estate of the Marquis de Lafayette, a French general and hero of the American Revolution (1775-83). LaGrange was incorporated in December 1828.