NISG
| Acronym | Definition |
|---|---|
| NISG | National Institute for Smart Government (India) |
| NISG | Northern Ireland Safety Group (est. 1952; UK) |
| NISG | Northern Iowa Student Government |
| NISG | Networking and Internet Software Group (Pune University; India) |
| NISG | Naval Installation Survey Group |
| NISG | Navy IPv6 Steering Group |