NK

NK may refer to:

Businesses

• Imerys, a French mining multinational (Euronext ticker:NK)
• Nordiska Kompaniet, a Swedish department store
• Northrup-King Seed Company, U.S.
• Spirit Airlines, U.S. (IATA:NK)
• 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 (nogomentni klub), a name suffix for Croatian and Slovenian football clubs

Places

• North Korea, a country
• Nagorno-Karabakh Republic, a de facto state (1991–2023)
• Nikšić, Montenegro (license plate:NK)
• North Kingstown, Rhode Island, U.S.
  • North Kingstown High School

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