NMSS may refer to:

National Multiple Sclerosis Society, a U.S. nonprofit Office of Nuclear Material Safety and Safeguards (NMSS), Nuclear Regulatory Commission; of the U.S. federal government National Movement for Simeon II (NMSS), a Bulgarian political party Nkuutu Memorial Secondary School, Bugweri, Uganda New Media Summer School, a project of the Association des États Généraux des Étudiants de l'Europe () NMSS (nuclear-powered missile ship, strategic), a fictional type of warship; see List of fictional ships

See also

NMS (disambiguation), for the singular of NMSs