Lamb County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 13,045. Its county seat is Littlefield. The county was created in 1876, but not organized until 1908. It is named for George A. Lamb, who died in the Battle of San Jacinto.

Littlefield is a city in and the county seat of Lamb County, Texas, United States. Its population was 6,372 at the 2010 census. It is located in a significant cotton-growing region, northwest of Lubbock on the Llano Estacado just south of the Texas Panhandle. Littlefield had a large denim-manufacturing plant operated by American Cotton Growers.