NNM can stand for:
the IATA code for the Naryan-Mar Airport Network Node Manager, a component of HP OpenView Network for New Music, founded by Joseph Waters and Linda Reichert in Vehicle registration plates of Japan, the abbreviation for Matsumoto, in the Nagano prefecture in Vehicle registration plates of Poland, the abbreviation for Nowe Miasto Lubawskie net new money, in the field of Assets under management Nordic Network Meeting, a conference in the Erasmus Student Network#Northern European Platform NASDAQ National Market, a stock market