what county is carrollton texas in
Carrollton is a city in Denton County, Dallas County and Collin County, Texas.As of the 2010 census, its population was 119,097 making it the twenty-third most populous city in Texas. It is a suburb of Dallas and in 2006 was named to America's Top 100 Places to Live by Relocate America.arrollton's significance was further strengthened when the railroad was extended to Denton in 1880 by Jay Gould, who sold the line to the MissouriâKansasâTexas Railroad (the Katy) in 1881. By 1885, Carrollton had flour mills, cotton gins, two churches, a school, and a population of 150.