Köln is a German word that can refer to:

• Köln (Cologne), the fourth largest city in Germany and largest city of the North Rhine-Westphalia state
• Köln an der Elbe is the old German name for the Czech town Kolín
• German Cruiser Köln (1930-1945), German K class cruiser served mostly for the Kriegsmarine
• German Frigate Köln (1961-1982), an F120 Köln class frigate of the Bundesmarine (German federal navy)
• German Frigate Köln (1989-today), an F122 Bremen class frigate of the Deutsche Marine (German navy)
• Kölsch (beer), a sort of beer produced in Cologne
• Kölsch language, the West Germanic Ripuarian dialect spoken in Köln
• Kölnisch Wasser, Eau de Cologne

The call letters KOLN may also refer to a CBS affiliate serving parts of Nebraska.

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