NMB may stand for: National Mediation Board, an independent agency of the U.S. government The Neal Morse Band, stylized as NMB since 2021 Nelson Mandela Bay Metropolitan Municipality, a metropolitan municipality in Eastern Cape, South Africa Neuromedin B, a peptide in mammals New methylene blue, an organic staining agent NMB Technologies, a subsidiary of MinebeaMitsumi North Miami Beach, Florida, a city in the U.S. Daman Airport, Daman and Diu, India, IATA airport code NMB NMB (Tanzania), a bank NMB Bank Nepal NMB Bank Limited, Zimbabwe Big Nambas language, ISO 639 code nmb See also NMB48, a Japanese music group