NK may refer to:

Businesses

  • Imerys, a French mining multinational (Euronext ticker:<code>NK</code>)
  • Nordiska Kompaniet, a Swedish department store
  • Northrup-King Seed Company, U.S.
  • Spirit Airlines, U.S. (IATA:<code>NK</code>)
  • NK.pl, a Polish social network (2006–2021)

Organisations

  • Neturei Karta, a group of anti-zionist orthodox Jews
  • Nippon Kaiji Kyokai, a ship classification society
  • NK (), a name suffix for Croatian and Slovenian football clubs

Places

  • North Korea, a country in Asia
  • Nagorno-Karabakh Republic, a de facto state (1991–2023)
  • Nikšić, Montenegro (license plate:<code>NK</code>)
  • North Kingstown, Rhode Island, U.S.
  • North Kingstown High School
  • Nasik Road railway station (station code: NK), Maharashtra, India

Other uses

  • NK (singer), a Ukrainian singer
  • Naik (military rank), in certain South Asian armies
  • Natural killer cell, in medicine
  • Neue Kerze ('new candle'; nk), original name for the photometric unit the candela
  • Norwegian krone, a currency
  • Normal Country (, NK), a Polish right-wing political party