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.