Oklahoma is the 8-letter answer to the crossword clue 'Neighbor of Texas'. Oklahoma is a state located in the South Central region of the United States. It borders Texas to the south, Arkansas and Missouri to the east, Kansas to the north, and Colorado to the northwest. Oklahoma is the 20th most extensive and the 28th most populous of the 50 United States. The state's name is derived from the Choctaw words okla and humma, meaning 'red people'.