NMU or nmu may refer to:
Education Northern Michigan University, a public university in Marquette, Michigan, US Nelson Mandela University, a public university in Port Elizabeth, South Africa National Mining University of Ukraine, now Dnipro University of Technology Nishtar Medical University, in Multan, Punjab, Pakistan North Maharashtra University, Maharashtra, India
Organizations National Maritime Union, a former American labor union National Miners' Union (1928–35), American affiliate of the Red International of Labour Unions Norsk Målungdom (Youth league of Noregs Mållag)
Other uses N-Nitroso-N-methylurea, an alkylating agent Neuromedin U (NmU or NMU), a neuropeptide Maidu language (ISO 639: nmu)