Niantic may refer to:
- Niantic people, tribe of American Indians
- Niantic, Inc., mobile app developer known for the mobile games Ingress and Pokémon Go
- Niantic Correctional Institution, now known as York Correctional Institution
Ships
- Niantic (whaling vessel), relic of San Francisco Gold Rush
- USS Niantic Victory, Victory ship later renamed USNS Watertown
- USS Niantic, US aircraft carrier later renamed HMS Ranee