CMN
CMN may refer to:
- The Casablanca airport IATA code
- The Chemins de fer des Montagnes Neuchâteloises, a former, in the transport Régionaux Neuchâtelois ( TRN) integrated, Swiss railway company
- A Clark 's nevus melanocytic, a brownish skin lesion as a potential precursor of malignant melanoma
- The French shipyard Constructions Mécaniques de Normandie in Cherbourg
- The former Italian Costruzioni Meccaniche Nazionali carmaker
- Disambiguation
- Abbreviation