what county is niagara falls in
Niagara Falls, NY. Online Offers. Niagara Falls is a city in Niagara County, New York, United States. As of the 2010 census, the city had a total population of 50,193, down from the 55,593 recorded in the 2000 census. It is across the Niagara River from Niagara Falls, Ontario (also a city), both named after the famed Niagara Falls which they share. It is part of both the BuffaloâNiagara Falls Metropolitan Statistical Area and the Western New York region.