 The portion of NY 351 north of the hamlet of Poestenkill was originally designated as New York State Route 153 in the 1930s.This designation was removed in the 1940s, and the West Sand Lake–Cropseyville roadway became County Route 77 (CR 77) sometime afterward.On April 1, 1980, all of CR 77 was transferred to the state of New York, at which time it was redesignated as NY 351 by the New York State Department of Transportation (NYSDOT).