Hamlin is a town in Monroe County, New York, United States.

The northern boundary is Lake Ontario and the western town line is the border of Orleans County, marked by New York State Route 272 (Monroe Orleans County Line Rd).

The Lake Ontario State Parkway passes across the north part of the town.

As of the census[7] of 2000, there were 9,355 people, 3,255 households, and 2,532 families residing in the town.

There was a myth that Hamlin's name was derived from that of the German city of Hamelin, this due to the fact that many residents in or near the hamlet of Hamlin were descended from German immigrants who had arrived during the late 1800s and settled in that part of the town.

17.4% of all households were made up of individuals, and 5.9% had someone living alone who was 65 years of age or older.