Southwest states and capitals State Capital Postal Abbreviation Nevada Carson City NV New Mexico Santa Fe NM Oklahoma Oklahoma City OK Texas Austin TX Click to see full answer. Correspondingly, what are the states and capitals of the southwest region? Southwest Region States and Capitals A B Oklahoma Oklahoma City Arizona Phoenix New Mexico Santa Fe United States Washington, D. C. Also, what are the abbreviations for the Southwest states? Southwest states, capitals, and abbreviations Essay State Capital Abbreviation Texas Austin TX New Mexico Santa Fe NM Arizona Phoenix AZ Oklahoma Oklahoma City OK Hereof, what are the 12 states of the Southwest region? Arkansas, Colorado, Louisiana, Montana, New Mexico, North Dakota, Oklahoma, South Dakota, Texas, Utah and Wyoming.What is considered the Southwest?For example, in 1948 the National Geographic Society defined the American Southwest as all of California, Nevada, Utah, Arizona, Colorado, and New Mexico, and the southernmost sections of Oregon, Idaho, and Wyoming, as well as parts of southwest Nebraska, western Kansas, Oklahoma, and Texas.

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