The flag of Ohio was adopted in 1902 and designed by John Eisemann. The large blue triangle represent Ohio's hills and valleys, and the stripes represent roads and waterways. The 17 stars symbolize that Ohio was the 17th state admitted to the union. The white circle with its red center not only represents the first letter of the state name, but also its nickname "the Buckeye State."

See the Flags of the World entry for the Ohio flag.