Niantic may refer to:
- Niantic (tribe), tribe of native Americans
- Niantic Labs, a subdivision of Google and developers of Ingress
- The Niantic Project, a fictional organization in the story behind Ingress
- Ships
- Niantic (whaling vessel), relic of San Francisco Gold Rush
- USS Niantic Victory, Victory ship later renamed USNS Watertown (T-AGM-6)
- USS Niantic (CVE-46), US aircraft carrier later renamed HMS Ranee (D03)
- Places
- Niantic, Connecticut
- Niantic, Illinois
- Niantic, Pennsylvania
- Niantic Bay, Connecticut
- Niantic River, Connecticut