The Flag of Kiel is the official flag of the city of Kiel, located in the northern German state of Schleswig-Holstein. It consists of three horizontal stripes in the colors blue, red, and white, with the blue stripe being placed at the top. The flag represents the historical affiliation of the city with Denmark, as well as its later inclusion in the Prussian and North German Confederations. The specific proportions of the flag are 3:5 (width to length ratio), making it distinct from other flags in Germany. Despite not being an official national or state flag, the Flag of Kiel holds significant cultural importance within the city of Kiel and its history.