Salo - Simo
- Salomonelaps
- Salomonelaps par
- Salvadora
- Salvadora bairdi
- Salvadora deserticola
- Salvadora grahamiae
- Salvadora hexalepis
- Salvadora mexicana
- Salvadora pulcherrima
- Sanzinia
- Sanzinia madagascariensis
- Saphenophis
- Saphenophis antioquiensis
- Saphenophis atahuallpa
- Saphenophis boursieri
- Saphenophis schneideri
- Saphenophis tristriatus
- Sator
- Sator angustus
- Sator grandaevus
- Sauresia
- Sauresia sepsoides
- Saurodactylus
- Saurodactylus fasciatus
- Saurodactylus mauritanicus
- Sauromalus
- Sauromalus ater
- Sauromalus australis
- Sauromalus hispidus
- Sauromalus klauberi
- Sauromalus obesus
- Sauromalus slevini
- Sauromalus varius
- Scaphiodontophis
- Scaphiodontophis annulatus
- Scaphiodontophis carpicinctus
- Scaphiodontophis venustissimus
- Scaphiodontophis zeteki
- Scaphiophis
- Scaphiophis albopunctatus
