Oklahoma celebrated 100 years of statehood in 2007.
Osage County, which is 2,251 square miles, is the largest county in Oklahoma.
The state bird of Oklahoma is the scissor-tailed flycatcher.
The official state flag of Oklahoma was adopted in 1925.
Oklahoma is one of two states whose capital city has the name of the state in it. The other is Indianapolis, Indiana.
The world's first installed parking meter was in Oklahoma City in 1935.
Choctaw, which gained status in 1893, is the oldest chartered town in Oklahoma.
Anadarko is home to the only authentic Indian City in the U.S.
Boise City was the only city in the U.S. to be bombed during World War II.