1. A city of western New York on the falls of the Niagara River north-northwest of Buffalo. It was settled in the early 1800s after the Americans gained control of Fort Niagara, a strategic garrison at the mouth of the river. The city grew as a tourist destination and is the site of the first commercial hydroelectric plant (1896).

2. A city of southeast Ontario, Canada, on the Niagara River opposite Niagara Falls, New York.