The word "Oklahoma" comes from two Choctaw Indian words meaning "red man." More American Indian tribes are headquartered in Oklahoma than in any other state, and 39 of those are federally recognized nations.

The aerosol can was invented in Bartlesville; the parking meter in Oklahoma; and the shopping cart in Ardmore.

Oklahoma City is the third largest city in land area (608 square miles), just behind Jacksonville, Florida, (759 square miles) and way behind Anchorage, Alaska (1,698 square miles).

Oklahoma's state capitol building is the only capitol in the world with an oil well under it. Although its legal name is Capitol Site No. 1, it is referred to as Petunia No. 1 because it was drilled in the middle of a flower bed.

Oklahoma's Cimarron County is bordered by more states than any other U.S. county: Oklahoma, Texas, New Mexico, Colorado and Kansas.

Oklahoma ranks fourth in the nation in the production of wheat, fourth in cattle and calf production, fifth in the production of pecans, sixth in peanuts and eighth in peaches.

The tallest building in Oklahoma is the Williams Center in Tulsa. The second tallest building is the CityPlex Tower, also in Tulsa. The Williams Center (also known as BOK Tower) is 667 feet tall, and the CityPlex Tower is 648 feet tall.

According to the National Restaurant Association, the most popular month to dine out is August, followed by July, May, June, October and December. The least popular month to dine out is February.

Oklahoma has a statewide area of 69,919 square miles, ranking 18th in the country in terms of size.

Oklahoma's two most populous cities are Oklahoma City, with 472,220 residents, and Tulsa, with 390,437. The next largest cities are Norman, population 87,290 and Lawton, population 86,028.

The highest point in Oklahoma is Black Mesa, located in the Panhandle, at 4,978 feet. The lowest point in the state is east of Idabel, in southeast Oklahoma, at 324 feet above sea level.

Oklahoma has four mountain ranges: Ouachita, Arbuckle, Wichita and Kiamichi, all in the southern half of the state. Forests cover approximately 24 percent of the state.

Oklahoma is second only to California in the size of its Native American population. Many of the 252,420 American Indians living in the state (8 percent of population) are descended from 67 tribes who inhabited Indian Territory (what is now the state of Oklahoma). Tribal headquarters for 39 tribes are located in Oklahoma. Tulsa ranks second in the United States for total number of American Indian residents, with 48,196. Oklahoma City ranks fourth, with 45,720 American Indian residents.

Oklahoma has a statewide population of 3,258,000, the 27th most populous state in the United States.

Oklahoma ranks fourth out of the 50 states for Americans who say they are of two or more races. The state with the largest population of multiracial people is Hawaii (21.4%), followed by Alaska (5.4%), California (4.7%) and Oklahoma (4.5%). Source: 2000 Census

The parking meter was invented in Oklahoma City.