The flag of the state of Oklahoma consists of a traditional Osage Nation buffalo-skin shield with seven eagle feathers on a sky blue field.
The Osage shield is covered by two symbols of peace: the calumet representing Native Americans, and the olive branch representing European Americans. Six golden brown crosses, Native American symbols for stars, are spaced on the shield. The blue field is inspired by the Choctaw flag adopted by the tribe in 1860 and carried though the American Civil War. The blue field also represents devotion. The shield surmounted by the calumet and olive branch represents defensive or protective warfare, showing a love of peace by a united people.
The governor's flag of Oklahoma consists of the state seal surrounded by five white stars on a green background. The flag has a golden fringe around its edges.
Historical Flag of Oklahoma
Oklahoma's first flag was adopted in 1911, four years after statehood. Taking the colors red, white, and blue from the flag of the United States, the flag featured a large centered white star fimbriated in blue on a red field. The number 46 was written in blue inside the star, as Oklahoma was the forty-sixth state to join the Union.
Flag of Oklahoma, 1911-1925
1925 to 1941 Design had no text till 1941.
1941 to 1988 Color changed as well as adding text.
1988 to 2006 Base field color more like steel blue.
Oklahoma State Flag Simplistic Proposal. The split star in the middle represents the two symbols of peace—the olive branch and the peace pipe—on the state’s current flag. It also represents the coming together of two nations, the Europeans and Native Americans. The “O” is the element tying them together. By Ed Mitchell. 2013.
Updated Oklahoma state flag proposal by Ed Mitchell. 2016.
Oklahoma Flag Proposal by Buddhafy. 2014.
Oklahoma Flag Proposal 2 by Buddhafy. 2014.
Oklahoma heritage flag, by Will Allen King.
OK flag proposal by 5thEye
Oklahoma State Flag - Redesign Proposal to remove complex detail. By RottenAli.
Oklahoma flag proposal by Tim Ritz. Textless version.
Oklahoma state flag proposed by Ken Morton
U.S. State Flags Monthly Competition August 2018.
"The blue background has been replaced with a red one and the dream catcher has been simplified and off-centered." Design by Francis Hayes (reddit u/Francis2011) Winner of the US State Flag competition Aug 2018.
My version a design by Hans. The white and green are the colors of the state and represent the white man pioneers who founded the state. The red and white represent the Native American bloodshed leading up to the state's founding. The cross represented here, both a symbol of Christian and Native American spirituality, is joined to represent the unification of two cultures within one state. Posted by Preston Knapp 
OK Flag Proposal "apollohawkridge"
Proposal for a flag for Oklahoma. The shield is represented by a large circle, the seven feathers are represented by seven white stripes on the side of the flag. By Qaz Dec 2019 (details)
Part of series of designs for state flags, all in blue and white. (Posted by Ken Morton)
the color of “Waving Wheat” ready for harvesting, the right triangle shall be a medium green representing the eastern part of the state known as “Green Country” and the center triangle shall be the color of Oklahoma’s “Red Earth”. The year “1907” shall be in black text and geometrically centered in the upper left quadrant of the flag. A red, five-pointed star, with the number “46” geometrically centered in the star in black text, representing Oklahoma’s admission number to the United States, shall be placed in the geometric center of the upper right quadrant of the flag. The word “OKLAHOMA”, in all capital letters and white text, shall be horizontally centered near the bottom of and entirely in the red earth triangle. A solid black rectangle, representing the state’s highest elevation at Black Mesa, shall be located at the bottom left corner of the blue field. A solid blue rectangle, representing Oklahoma’s beautiful lakes, matching the color of the upper blue field of the flag, shall be located at the upper right corner of the green triangle. A detailed, computer rendered image of Oklahoma’s state bird, the scissortail fly-catcher in flight, flying up to the right and away from the viewer, shall be positioned at the center of the flag, overlapping over all four of the colored fields.