Ohio's state flag was adopted in 1902.
John Eisemann designed the Ohio burgee, as the swallowtail design is properly called. The large blue triangle represents Ohio's hills and valleys, and the stripes represent roads and waterways.
The 13 stars grouped about the circle represent the original states of the union the 4 stars added to the peak of the triangle symbolize that Ohio was the 17th state admitted to the union.
The white circle with its red center not only represents the "O" in Ohio, but also suggests Ohio's famous nickname, "The Buckeye State."