SGW may refer to:
- Saginaw Seaplane Base, in Alaska
- Sebat Bet Gurage language
- Shinagawa Station, JR East station code
- Siġġiewi, Malta
- Signaling gateway
- Sloan Great Wall, a cosmic structure
- Sniper: Ghost Warrior, a video game series by CI Games
- Sons of Gwalia, a defunct Australian mining firm
- Stargate Worlds, an unreleased video game
- Serving Gateway, in the System Architecture Evolution standard