 By 1885, Carrollton had flour mills, cotton gins, two churches, a school, and a population of 150.The St. Louis Southwestern Railway (the "Cotton Belt") crossed the Katy in 1888, and the town became a shipping center for livestock, cotton, cotton seed, and grain, helping the town surpass Trinity Mills to the north.In 1913 Carrollton was officially incorporated, and W.F.