 U.S. Route 27 passes through the city center, leading north to Interstate 20 in Bremen and south to LaGrange.According to the United States Census Bureau, Carrollton has a total area of , of which is land and , or 2.37%, is water.Carroll County, of which Carrollton is the county seat, was chartered in 1826, and was governed at the time by the Carroll Inferior Court, which consisted of five elected justices.