KNM may refer to:
- Kongelig Norsk Marine, since 1946 a ship prefix of the Royal Norwegian Navy. The ships use the prefix HNoMS (His Norwegian Majesty's Ship) in English.
- Koninklijke Nederlandse Munt or Royal Dutch Mint
- Kerala Nadvathul Mujahideen, a Salafi movement in Kerala State, India
- Konami, a Japanese developer and publisher of games, whose shares formerly traded on the New York Stock Exchange under the ticker symbol KNM