City of Louisville flag

Thirteen white stars in a circle fill the upper hoist, and three gold fleurs-de-lis sit in the fly, on a blue field matching the blue of the U.S. flag.

The stars honor the thirteen original colonies, and the fleurs-de-lis show "continuing good will between our people and the people of France." The city was named for Louis XVI, king of France when Louisville was founded in 1778.

Its official adoption is dated 1927 or 1934, depending on the source, and the design may be older: the ordinance cites the 1910–11 edition of the Encyclopaedia Britannica. No single designer is credited.

In a national survey of city flags released in 2004, it ranked ninth best in the country. Sources differ on when it was retired: Wikipedia says at the 2003 merger, while Flags of the World records a seal flag in use just before it.