Brownfield is a city in Terry County, Texas, United States. Its population was 9,657 at the 2010 census. Brownfield is 39 miles southwest of Lubbock, it is the county seat of Terry County.

According to the United States Census Bureau, Brownfield has an area of 6.3 sq mi (16 km), 0.32% of which is covered by water.

Brownfield lies in the center of Terry County, in the southern allowance of the South Plains and Llano Estacado. The city rests on a windblown addition called the Blackwater Draw Formation, which is underlain by a thick deposit of caliche, referred to locally as the “caprock”. Beneath the caliche enlargement lies fluvial deposits called the Ogallala Formation, which contains a portion of the Ogallala Aquifer. The Caprock Escarpment, about 50 miles east, forms a precipitous Fall of more or less 1,000 feet (305 m) and exposes various geologic layers. In further on days, climbing the Caprock Escarpment was not simple for horse-drawn covered wagons.

The only terrain variation lies at the south fade away of the city, where Lost Draw carves a channel that runs across the whole county. Lost Draw formed beyond 10,000 years ago at the fade away of the last ice age, when the climate of the area was much wetter. When the huge glaciers of the north retreated, they left numerous temperate river channels crisscrossing the Llano Estacado. When settlers during the 1800s ventured across this area, they often went into these channels expecting to find water, but unless significant rains had occurred recently, their search was in vain, with many of the parties becoming “lost”, hence the name, Lost Draw.