SMN

SMN may refer to:

• Lemhi County Airport, IATA airport code of SMN
• Netherland Line (Stoomvaart Maatschappij Nederland)
• Seri Maharaja Mangku Negara, a Malaysian honour
• S-m-n theorem, a computability theorem regarding programming languages
• Servicio Meteorológico Nacional (Mexico), Mexico's National Meteorological Service
• Servicio Militar Nacional, Mexico's National Military Service
• Société Métallurgique de Normandie, a steel mill in Caen, Normandy, France
• Stathmin protein
• Satellite Music Networks, a US radio network
• Inari Sámi language, ISO language code of SMN
• Survival of motor neuron protein, a protein complex
• Shawnee Mission North, a high school in the Shawnee Mission School District in Kansas