Norfolk is a hamlet (and census-designated place) in St. Lawrence County, New York, United States.

Norfolk is located on New York State Route 56 at the junction of County Roads 38, 38A, and 47.

There were 610 housing units at an average density of 227.5 per square mile (87.8/km2).

The racial makeup of the CDP was 97.5% White, 0.01% Black or African American, 0.4% Native American, 0.8% Asian, 0.30% Pacific Islander, and 0.90% from two or more races, 1.0%Hispanic or Latino of the population.

29.4% of all households were made up of individuals, and 17.9% had someone living alone who was 65 years of age or older.