Brownfield is located southwest of Lubbock US 380 and US 385 cross, near Tahoka Lake.
It lies in Terry County just east of the Texas/New Mexico state line.
As County Seat, the town's population increased from 6,160 in 1950 to 10,286 in 1960. It dropped to 9,647 during the next ten years, as agricultural productionmainly in field cropsand income decreased 30 percent from 1964 to 1969. In 1986 the county remained one of the leading cotton-producing counties in the state. In 1988 Brownfield had a population of 10,846. In 1990 it was 9,560.