MNS

MNS may refer to:


 * Maharashtra Navnirman Sena, Indian political party
 * The Malaysian Nature Society
 * Maki-Nakagawa-Sakata matrix in particle physics
 * Ministry of National Security of several countries
 * Minneapolis, Northfield and Southern Railway, reporting mark
 * Mirror neuron system
 * Mission Need Statement
 * MNS antigen system, a variant blood group
 * Monday Night Soccer, an Irish television programme
 * Movement for a New Society
 * National Syndicalists (Portugal), Movimento Nacional-Sindicalista
 * Manganese(II) sulfide, chemical symbol MnS
 * Mansi language, by ISO 639-3 language code