What does "Wyoming" mean?
According to the Wyoming Secretary of State; "The name Wyoming is a contraction of the Native American word mecheweamiing ("at the big plains"), and was first used by the Delaware people as a name for the Wyoming Valley in northeastern Pennsylvania."
According to another source (Ben's Guide to U.S. government Kids pages), the name Wyoming is based on an Algonquin Indian word meaning "large prairie place." All State Name Origins
Wyoming became the 44th state on July 10, 1890.