Cockrell Hill is a city in Dallas County, Texas, United States. The population was 4,193 at the 2010 census, and 3,815 in 2020. It is completely surrounded by the city of Dallas.

Dallas County is the second-most populous county in the U.S. state of Texas with a 2020 U.S. census of 2,613,539, making it the ninth-most populous county in the country. Dallas County is included in the Dallas-Arlington-Fort Worth metropolitan statistical area—colloquially referred to as the Dallas–Fort Worth metroplex. Municipal expansion within Dallas County has blurred the geographic lines between cities and between neighboring counties.