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Carrollton is a city in Denton County, Dallas County and Collin County in the U.S. state of Texas. As of 2005, census estimates the city's total population to be 122,699. Carrollton is a suburb of Dallas. The city of Carrollton has been named to America's 2006 Top 100 Places to Live for 2006 by Relocate America.
According to the United States Census Bureau, Carrollton has a total area of 37.1 square miles (96.1 km 2), of which 36.3 square miles (94.0 km 2) is land and 0.81 square miles (2.1 km 2), or 2.19%, is water. Carrollton is located in portions of three counties: Dallas County, Denton County and Collin County.arrollton's significance was further strengthened when the railroad was extended to Denton in 1880 by Jay Gould, who sold the line to the MissouriâKansasâTexas Railroad (the Katy) in 1881. By 1885, Carrollton had flour mills, cotton gins, two churches, a school, and a population of 150.