Seagoville is a city in Dallas County, Texas, United States, and a suburb of Dallas. A small portion of Seagoville extends into Kaufman County. The population was 18,446 at the 2020 census. The city is located along U.S. Highway 175, 10 miles (16 km) from downtown Mesquite.

Kaufman County is a county in the northeastern area of the U.S. state of Texas. As of the 2020 census, its population was 145,310. Its county seat is Kaufman. Both the county, established in 1848, and the city were named for David S. Kaufman, a U.S. Representative and diplomat from Texas. Kaufman County is part of the Dallas-Fort Worth-Arlington metropolitan statistical area.