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is a city in and the county seat of Howard County, Texas, United States, at the crossroads of U.S. Highway 87 and Interstate 20. With a population of 25,233 at the 2000 census, it is the largest city between Midland to the west, Abilene to the east, Lubbock to the north, and San Angelo to the south. Big Spring was established as the county seat of Howard County in 1882; it is the largest community in the county.
The city got its name from the single, large spring that issued into a small gorge between the base of Scenic Mountain and a neighboring hill in the southwestern part of the city limits.
According to the United States Census Bureau, the city has a total area of 19.2 square miles (49.7 km²). 19.1 square miles (49.5 km²) of it is land, and 0.1 square miles (0.2 km²) of it (0.42%) is water.