 The population was 25,545 at the 2010 census, up from 21,263 at the 2000 census.Wasco is the headquarters of the Tejon Indian Tribe of California, a federally recognized tribe of Kitanemuk, Yokuts, and Chumash indigenous people of California.The name Dewey was in honor of Admiral George Dewey, a hero of the Spanish–American War.