Budin's tuco-tuco (Ctenomys budini) is a species of rodent in the family Ctenomyidae. It is endemic to southeast Jujuy Province in northwest Argentina. Given the extensive human presence in its limited range, it is suspected to be threatened. It is viewed as possibly being a subspecies of C. frater. The species is named after Emilio Budin, an Argentine specimen collector who worked with Oldfield Thomas.