S
- Sugar Milling Research Institute (SMRI)
- Sugar Milling Research Institute NPC (SMRI)
- Suid-Afrikaanse Akademie Vir Wetenskap & Kuns (SAAWK)
- Sunshine Association (SA)
- Sunshine Coast Tourism (SCT)
- Surfing SA (SSA)
- Surgical Disciplines Representative Association of SA (SDRASA)
- Surgical Research Society of SA (SRSSA)
- Sussex Cattle Breeders’ Society of South Africa (SCBSSA)
- Sustainable Energy Society of Southern Africa (SESSA)
- Sustainable Agriculture in South Africa (SIZA)
- Sustainable Energy Fund for Africa (SEFA)
- Swimming Sa (SSA)
- Swiss Rifle Club Cape Town (SRCCT)
- Swiss Rifle Club Johannesburg (SRCJ)
- Swiss Rifle Club Natal (SRCN)
- Working on Fire (SATAS)