Oslo Skøiteklub (OSK) is a sports club in Oslo. Its home arena is Frogner Stadion. The club has departments for speed skating and figure skating.

Laila Schou Nilsen was one of the foremost Norwegian sportspeople of the 20th century, best known as a speed skater, alpine skier, and tennis player. She was one of the pioneers in women's speed skating, both in Norway and internationally, along with two other skaters from the Oslo Skøiteklub, Undis Blikken and Synnøve Lie. Across her sporting career – which also included handball, ski jumping, cross-country skiing, and motorsport – Nilsen won 101 Norwegian Championship titles, of which 86 were in tennis.