Mansfield is a suburban city in the U.S. state of Texas, and is part of the Dallas-Fort Worth Metroplex area. The city is located mostly in Tarrant county, with small parts in Ellis and Johnson counties. Its location is approximately 30 miles from Dallas and 20 miles from Fort Worth, and is adjacent to Arlington. As of the 2010 census, the population was 56,368, up from 28,031 in 2000. The estimated population in 2020 is 73,550.