State of Wyoming A state in the northwestern region of the United States. Wyoming is bordered on the north by Montana, on the east by South Dakota and Nebraska, on the south by Colorado, on the southwest by Utah, and on the west by Idaho. LanguaL curation note: US FDA 1995 Code: US56 wyoming West Region State of Wyoming A state in the northwestern region of the United States. Wyoming is bordered on the north by Montana, on the east by South Dakota and Nebraska, on the south by Colorado, on the southwest by Utah, and on the west by Idaho. LanguaL curation note: US FDA 1995 Code: US56 wyoming West Region