Ransomville is a hamlet (and census-designated place) located in the Town of Porter in Niagara County, New York, United States. The population was 1,419 at the 2010 census. Portions of the hamlet of Ransomville are also in Town of Wilson and Town of Cambria. Ransomville is north of the City of Niagara Falls and is part of the Buffalo–Niagara Falls Metropolitan Statistical Area.
Ransomville is in the southeast corner of the town on the Youngstown-Lockport Road (New York State Route 93).