Oklahoma State Symbols, Facts & Info. The United States of America accepted Oklahoma as the 46th state to enter the union. Below, you will find the official. Oklahoma is a state in the South Central region of the United States. It is the 20th- most Further information: List of Native American artists from Oklahoma. Find out more about the history of Oklahoma, including videos, interesting articles, pictures, historical features and more. Get all the facts on casinohilfe.review.