The article about the State of Oklahoma is at Oklahoma
For the musical comedy Oklahoma! see Oklahoma!
For the movie Oklahoma (no exclamation mark) see Oklahoma (1979 movie)
For the movies Oklahoma! (with exclamation mark) Oklahoma! (1955) and Oklahoma! (1999)
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Oklahoma was the last remnant of the Indian Territory.
Oklahoma is bounded on the north by Kansas and Colorado, on the west and south by New Mexico and Texas (with part of the Texas border delineated by the Red River (of the South)[?], and on the east by Missouri and Arkansas.
As of the 2000 census, the population of Oklahoma is 3,450,654.
Oklahoma is bounded on the east by Arkansas and Missouri, on the north by Kansas and northwest by Colorado (both at 37°N), on the far west by New Mexico (at 103°W), and on the south and near-west by Texas.
Oklahoma's natural terrain is very diverse, ranging from oak and hickory mixed forest in the wetter eastern part of the state, to the post oak and fljack oak savannah territory of the Cross Timbers, to the plains and semi-arid regions of western Oklahoma and the panhandle.
Oklahoma City is the principal economic engine of the state, centered on the finance, retail, governance, entertainment, and tourism sectors.