SSG is a TLA that may stand for:
- Simple Scene Graph module of PLIB
- Sipoo Shooting Guild
- Special Support Group (Botswana)
- Stochastic Systems Group (MIT)
- Strategic Studies Group Inc.
- Strategic Studies Group (US Navy)
- Staff sergeant
- the creator of Eksi Sozluk
- US Navy hull classification symbol for conventionally (not nuclear) powered guided missile submarines