NSB may refer to:

• Natural Snow Buildings, a French experimental music duo
• Nihilist Spasm Band, Canadian free improvisation musical collective
• Nu skool breaks, a subgenre of breakbeat music originating during the period between 1998 and 2002
• Nature Structural & Molecular Biology, an academic journal
• Nippon Shortwave Broadcasting (now Radio Nikkei), a domestic commercial shortwave radio station in Japan

• FBI National Security Branch, the United States Federal Bureau of Investigation's branch responsible for investigating threats to national security
• National Seamen Board of the Philippines
• National Science Board, the governing body of the National Science Foundation
• National Security Bureau (Republic of China), the intelligence agency of the Republic of China (Taiwan)
• National Socialist Bloc, an historical political movement in Sweden
• National Socialist Movement in the Netherlands (Nationaal-Socialistische Beweging), a fascist political movement in the Netherlands (1931–1945)
• Naval Submarine Base (United States):
  • Naval Submarine Base Kings Bay
  • Naval Submarine Base New London
• Norwegian State Railways (1883–1996), a former state-owned railway company that operated most of the railway network in Norway
• Vy, formerly Norwegian State Railways (Norges Statsbaner), a government-owned railway company which operates most passenger train services in Norway

• National Science Bowl, a middle and high school academic competition
• Scripps National Spelling Bee, a competition in the United States

• Newcastle School for Boys, a British independent school
• North Sydney Boys High School, an Australian high school
• Northampton School for Boys, a British Secondary School

• NSB Niederelbe Schiffahrtsgesellschaft [de]
• National Savings Bank (Sri Lanka)
• Neusiedler Seebahn [de]
• Nevada State Bank, a bank in the United States
• New Smyrna Beach, Florida, a city in the United States
• Newtown Savings Bank, a bank in the United States
• Normans Bay railway station, a railway station in Sussex, England

This disambiguation page lists articles associated with the title NSB.
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