Oklahoma is a
state located in the
South Central region of the
United States of America. With an estimated 3,617,316 residents in 2007 and a land area of 68,667 square miles (177,847 km˛), Oklahoma is the
28th most populous and
20th-largest state. The state name is derived from the
Choctaw words
okla and
humma, meaning "red people",
[5] and is known informally by its nickname,
The Sooner State. Formed from the
Indian Territory on November 16, 1907, Oklahoma was the 46th state to enter the union. Its residents are known as
Oklahomans, and its capital and largest city is
Oklahoma City.
