Randall County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 120,725. Its county seat is Canyon. The county was created in 1876 and later organized in 1889. It is named for Horace Randal, a Confederate brigadier general killed at the Battle of Jenkins Ferry. The reason the county name differs from his is because the bill creating the county misspelled Randal's name.Randall County is part of the Amarillo, Texas, Metropolitan Statistical Area.At one time, the large JA Ranch, founded by Charles Goodnight and John George Adair, which reached into six counties, held acreage in Randall County.GeographyAccording to the U.S. Census Bureau, the county has a total area of, of which is land and (1.2%) is covered by water.Palo Duro Canyon, the second-largest canyon in the United States, is located in Randall County.Major highways20px Interstate 2720px U.S. Highway 6020px U.S. Highway 8720px State Highway 21720px Loop 335