Mansfield is a city in the U.S. state of Texas, and a suburb of the Dallas-Fort Worth metro 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 2020 census, the population was 72,602, up from 56,368 in 2010.