NK may refer to:
The People's Commissariat for Internal Affairs (Народный комиссариат внутренних дел, Narodnyi Komissariat Vnutrennikh Del), abbreviated NKVD (НКВД listen ), was the leading Soviet secret police organization from 1934 to 1946. It is known for its role in political repression and carrying out the Great Purge under Joseph Stalin.
Nogometni Klub Maribor (English: Maribor Football Club), commonly referred to as NK Maribor or simply Maribor, is a professional football club based in Maribor, Slovenia.
NK Osijek is a professional football club from Osijek in eastern Croatia. Founded in 1947, it was the club from Slavonia with most seasons in the Yugoslav First League, and, after the independence of Croatia in 1992, it is part of the four clubs that were never relegated from the Croatian First League, the others being Dinamo Zagreb, Hajduk Split and Rijeka.
Nogometni klub Široki Brijeg (English: Football Club Široki Brijeg) is a professional football club, based in Široki Brijeg, Bosnia and Herzegovina.
Nkosazana Clarice Dlamini-Zuma (born 27 January 1949) is a South African politician and anti-apartheid activist.
Nogometni Klub Inter Zaprešić (English: Football Club Inter Zaprešić) is a professional Croatian football club based in Zaprešić, a town northwest of the capital Zagreb.