- Language: Nahavaq
- Alternate names: South West Bay, Sinesip, Seniang, Na'ahai, Mallicolo
- Language code: sns
- Language family: Austronesian, Malayo-Polynesian, Central-Eastern Malayo-Polynesian, Eastern Malayo-Polynesian, Oceanic, North and Central Vanuatu, Central Vanuatu, Malakula, Western Malakula linkage, Peripheral Western Malakula, Southwestern Malakula, Southwest Coastal Malekula
- Number of speakers: 700
- Vulnerability: Endangered
- Script: Latin script.
Nahavaq is spoken in Vanuatu, Pacific.