SSK may refer to:
- SSK, the United States Navy's hull classification symbol for diesel-electric hunter-killer submarines
- Mercedes-Benz SSK, a vintage era roadster and racing car
- Sentral di Sindikatonan di Korsou, the Trade Union Centre of Curaçao
- Signed Subspace Key
- Sistema Simvolicheskogo Kodirovanija, an assembly language for Minsk family of computers
- Sociology of scientific knowledge
- Sosyal Sigortalar Kurumu, a social security organization in Turkey
- Sound Sessions Kollectiv, a remix artist from Canada
- Södertälje SK, an ice hockey club in Sweden
- Sasural Simar Ka, Indian Daily Soap
- Skopski sport klub, a soccer club in Macedonia