Only State With a Non-Rectangular Flag (In the US)

Ohio's flag is the only state flag in the US that isn't rectangular — it's a swallowtail burgee with a V-shaped cutout creating two pointed tails. Designed by architect John Eisenmann for the 1901 Pan-American Exposition, it was officially adopted on May 9, 1902. Its colors and symbols represent Ohio's hills, waterways, and its status as the 17th state. There's even more fascinating history and symbolism behind this one-of-a-kind flag waiting for you ahead.

Key Takeaways

• Ohio is the only U.S. state with a non-rectangular flag, featuring a swallowtail burgee design with a distinctive V-shaped cutout.
• Cleveland architect John Eisenmann designed the flag for the 1901 Pan-American Exposition in Buffalo, New York.
• The Ohio Legislature officially adopted the flag on May 9, 1902, over 120 years ago, unchanged since creation.
• Seventeen stars honor Ohio as the 17th state, while the white circle and red disc symbolize the buckeye nut.
• The flag's shape was inspired by naval burgee and U.S. cavalry guidon traditions, reinforcing a unique civic identity.

Ohio's Non-Rectangular Flag: What Makes It Unique?

Among all fifty U.S. state flags, Ohio's stands alone as the only one that isn't rectangular. Officially called the Ohio Burgee, it features a swallowtail design with a V-shaped cutout creating two pointed tails. This distinctive shape draws from both naval signaling traditions and military heritage, mirroring pennants historically flown from yacht mastheads and forked-tail guidons carried by U.S. cavalry units.

The flag's blue triangle represents Ohio's hills and valleys, while its red and white stripes symbolize the state's roads and waterways. A white circle forming the letter "O" surrounds a red disc representing the buckeye nut.

Adopted on May 9, 1902, the design has inspired modern reinterpretations in vexillography, reinforcing Ohio's unique position as the only U.S. state whose flag bridges civic identity and nautical tradition. The flag was originally designed by John Eisenmann for the 1901 Pan-American Exposition in Buffalo, New York, where it received notable public attention before being officially adopted the following year.

The flag's non-rectangular, mirror-symmetric shape means it can be flown or hung in various orientations without affecting legibility. Eisenmann assigned his design patent to the State of Ohio on April 24, 1902, just weeks before the flag was officially designated by the state legislature. On the global stage, Ohio's burgee shape echoes the uniqueness of Nepal's double-triangle flag, the only national flag in the world that is also non-rectangular, highlighting how distinctive flag shapes can carry deep cultural and geographic meaning.

Who Designed Ohio's Flag and Why?

Although Ohio's distinctive burgee didn't become official until 1902, its origins trace back to a practical need: the state lacked an official flag for nearly 100 years after achieving statehood in 1803.

When Ohio needed representation at the Pan-American Exposition in Buffalo, the commission turned to Cleveland-based architect and engineer John Eisenmann. He designed the flag specifically to fly over Ohio's exposition building, creating detailed specification diagrams and securing a U.S. patent for the unique swallow-tailed shape.

Eisenmann completed his patent assignment to the State of Ohio on April 24, 1902.

Representative William S. McKinnon, who'd served on the Ohio Pan-American Exposition Commission, introduced the flag as House Bill 213. The Ohio Legislature officially adopted it on May 9, 1902. The flag features seventeen white stars grouped around a central red disc and white "O" on the blue triangular field.

The design has remained unchanged since its creation, with the three red and two white stripes representing state roadways and waterways. Ohio's pennant-shaped flag stands apart from the rectangular national flags used by most countries around the world, nearly all of which follow a standard oblong format.

The Hidden Meaning Behind Ohio's Flag Symbols

Ohio's burgee packs remarkable symbolism into its distinctive shape, and each element tells part of the state's story. The red disc represents Buckeye symbolism, resembling the seed of Ohio's official state tree while also nodding to the state's origins in the Northwest Territory. Surrounding it, a white O announces Ohio's name and reinforces its Buckeye State nickname.

The 17 white stars in the blue triangular field honor Ohio's 1803 entry as the 17th state, with 13 stars representing the original colonies. That blue triangle itself reflects Ohio's hills and valleys. The four remaining stars are placed to the right of the circle, distinct from the 13 arranged around it.

Meanwhile, the three red and two white stripes symbolize the state's roads and waterways, and the colors mirror those of the U.S. flag, grounding Ohio's identity within the broader national story. The flag's unique design was copyrighted by John Eisenmann in 1901, created specifically for display at the Pan-American Exposition before becoming Ohio's official flag on May 9, 1902. Ohio's flag remains instantly recognizable among all U.S. state flags precisely because its swallowtail burgee shape sets it apart from the rectangular designs adopted by every other state.

Where Ohio's Flag Made Its Historic Debut

The rich symbolism woven into Ohio's burgee didn't emerge in a vacuum — it made its public debut at a specific moment in history that shaped the flag's identity. In 1901, the Pan American Exposition in Buffalo, New York, gave Ohio's distinctive flag its first public showing. Architect John Eisenmann designed four wool Exhibition Flags for the Ohio Building, flying them over its four corners throughout the event.

Here's something worth noting: those flags technically represented the Ohio Pan-American Exposition Commission, not the state itself. But the burgee's unusual swallowtail shape drew considerable attention from visitors. That buzz helped fuel the momentum behind making it official. Just a year later, in May 1902, Ohio formally adopted Eisenmann's design as its state flag. Governor George K. Nash visited the exposition on July 18 and was personally presented with one of those original flags, which is now preserved in the Ohio History Connection collections.

Prior to the flag's adoption, no official state flag had represented Ohio for nearly a century since it achieved statehood on March 1, 1803.

How Ohio's Flag Design Reflects the State's History

Every element of Ohio's burgee tells a piece of the state's story. You'll find meaningful symbolism woven into each design choice, connecting the flag to Ohio's geography, history, and identity.

Here are three key design elements and what they represent:

1. Red and white stripes reflect Ohio's transport heritage, honoring the roads and waterways that fueled industrial growth and commerce.
2. Blue triangular field represents Ohio's hills and valleys, capturing the state's distinct landscape.
3. Seventeen stars acknowledge Ohio's place in history — 13 for the original states and 4 marking Ohio as the 17th state admitted to the Union.

The red disk inside the white "O" symbolizes a buckeye seed, tying the flag directly to Ohio's beloved state nickname. The flag's distinctive swallowtail shape was designed by John Eisenmann in 1902, making it the only non-rectangular flag among all U.S. states. Ohio went without an official state flag for its first 99 years of statehood, with the 1901 Pan-American Exposition ultimately prompting the need for one.

Why Ohio's Flag Still Turns Heads Today

More than 120 years after its adoption, Ohio's swallowtail burgee still stands out in a crowd. Its V-shaped cutout and triangular blue field make it instantly recognizable anywhere you see it flying. Unlike every other state flag, Ohio's design borrows from nautical burgee and military guidon traditions, giving it a modern allure that feels fresh rather than dated.

You'll spot it across social media feeds, where its unique shape consistently sparks curiosity and conversation among flag enthusiasts worldwide. It's also thriving in modern merchandising, appearing on everything from apparel to home décor. Ohioans fly it proudly at public buildings and events, knowing it'll turn heads every time. That combination of distinctive design and enduring symbolism keeps Ohio's flag culturally relevant and visually compelling today.