U.S. Department of the Interior. The Department of the Interior manages public lands and minerals, national parks, and wildlife refuges and upholds Federal trust responsibilities to Indian tribes and Native Alaskans. Additionally, Interior is responsible for endangered species conservation and other environmental conservation efforts.
Acquired November 13, 2002, this false-color image shows part of the Ouachita Mountains in southeastern Oklahoma. Acquired November 13, 2002, this false-color image shows part of the Ouachita Mountains in southeastern Oklahoma.
Oklahoma is bordered by Colorado and Kansas on the north. On the south, Oklahoma is bordered by Texas. On the east, Oklahoma is bordered by Missouri and Arkansas and on the west, Oklahoma is bordered by New Mexico and Texas. Total Area. Oklahoma covers 69,903 square miles, making it the 20th largest of the 50 states.