Ohio

The only state flag that is a swallow-tail pennant, Ohio designed its flag in 1902 for the Pan-American Exposition in Buffalo (where President William McKinley, a native of Ohio, was assassinated…although I’m sure that was just a coincidence).

The central circle resembles both an ‘O’ and a buckeye nut. The triangle is for the hills and valleys, 13 stars on the left for the original 13 colonies, and the 4 stars on the right as Ohio is the 17th state. The stripes represent the roads and waterways.