NK
NK my refer to
Businesses
Places
- Nagorno-Karabakh Republic a de facto state in the Nagorno-Karabakh region
- Nikšić Montenegro (license plate code NK)
- North Korea a common name for the Democratic People's Republic of Korea (DPRK)
Other uses
- Natural killer cell , in medicine
- Neue Kerze aka new candle, an old photometric unit of luminous intensity
- NK, nogomentni klub, a Football team in Croatian and Slovenian (e. g. (N.K. Osijek), NK Maribor