NSK may refer to:
Arts and media Neue Slowenische Kunst, a Slovenian art collective Japan Newspaper Publishers and Editors Association () Japan Sumo Association () N. S. Krishnan, Indian comedian in Tamil cinema
Places Alykel Airport, Siberia, Russia (IATA:NSK) National and University Library Zagreb, Croatia () Niihau School of Kekaha, Hawaii, US
Other uses NSK Ltd., a Japanese bearing manufacturer NSK Trade City, a Malaysian grocery chain National Special Crime Unit (Denmark) () Nuselský SK, a Czech football club Nasjonal Samling Kvinneorganisasjon, women's wing of the Norwegian Nazi party (1934–1945)