Crosby County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 6,059. The county seat is Crosbyton. The county was founded in 1876, both the county and its seat are named for Stephen Crosby, a land commissioner in Texas.
Crosby County, along with Lubbock County, and Lynn County, is part of the Lubbock Metropolitan Statistical Area (MSA). The Lubbock MSA and Levelland Micropolitan Statistical Area (µSA), encompassing only Hockley County, form the larger Lubbock–Levelland Combined Statistical Area (CSA).
Until the passage of a referendum to permit liquor sales, held on May 11, 2013, Crosby County had been one of nineteen remaining prohibition or entirely dry counties within Texas. That same day voters in Denver City and Yoakum County also approved separate referenda to permit liquor sales. The number of prohibition counties in Texas has hence dropped to seventeen. Part of the large Matador Ranch of West Texas extends into the county. Republican Drew Springer, Jr., a businessman from Muenster in Cooke County, has since January 2013 represented Crosby County in the Texas House of Representatives.