Hamilton County New York (Historic Districts) has 3 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include Civilian Conservation Corps Camp S-90 (Speculator), Hedges, The, Whelan Camp.
The famous person Hiram B. Duryea is associated with one of more of the Hamilton County historic places. Prominent architectural styles found in Hamilton Country are Late 19th And Early 20th Century American Movements and Shingle Style.