MNO (disambiguation)

MNO is an abbreviation for mobile network operator. It may also refer to
 * Manganese oxide (MnO)
 * Ministry of Defence in some Slavic-speaking countries:
 * Ministry of Defence (Czechoslovakia)
 * Ministry of Defence of the Slovak State
 * Multinational organization
 * Manono Airport (IATA airport code MNO) in Manono, Democratic Republic of the Congo
 * Master of Nonprofit Organizations, a graduate-level degree