NSG

• Nippon Sheet Glass, a Japanese glass manufacturer
• NetWare Systems Group, Novell's defunct operating system division

• National Security Guard, a federal counterterrorism force in India
• National Street Gazetteer, a database of all streets in England and Wales
• Naturschutzgebiet, a nature protection category in Germany
• Nebraska State Guard, active during World War II and the Vietnam War
• Nordic Support Group, a multinational peacekeeping force
• Nuclear Suppliers Group, an international export regulation body

• Northampton School for Girls, a high school in Northampton, England
• New Southgate railway station, London (by station code)

• NSG (group), a British music collective
• NSG mouse, an immunodeficient laboratory mouse strain
• North Sea Gas, natural gas from Europe's North Sea oil field

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