Wyoming, constituent state of the United States of America. Wyoming became the 44th state of the union on July 10, 1890. It ranks 10th among the 50 U.S. states in terms of total area. It shares boundaries with six other Great Plains and Mountain states: Montana to the north and northwest, South Dakota and Nebraska to the east, Colorado to the south, Utah to the southwest, and Idaho to the west. Cheyenne, the capital, is located in the southeastern corner of the state.
The word Wyoming is derived from a Delaware word meaning “land of vast plains,” an apt description of the state’s spacious natural environment, which is home to nearly as many pronghorn as people.