Canada
- Niagara Falls, city ofOntario
- Niagara-on-the-Lake, city ofOntario
- Niagara Peninsula, region of Ontario
United States of America
- Niagara, a city in Grand Forks County, North Dakota
- Niagara Falls, city in Niagara County, New York
- Niagara, city in Niagara County, New York
- Niagara, a town in Marinette County, Wisconsin
Other
- Niagara, river ofNorth America
- Niagara Falls, waterfall of the homonymous river