Henderson is a hamlet and census-designated place (CDP) in the town of Henderson, Jefferson County, New York, United States. The population of the CDP was 224 at the 2010 census, out of 1,360 in the entire town of Henderson. Geography The hamlet of Henderson is located in southwestern Jefferson County, in the center of the town of Henderson. The community is in the valley of Stony Creek, a southwestward-flowing tributary of Lake Ontario. New York State Route 178 runs through the center of the community, leading west to New York State Route 3 and southeast to Adams. Henderson Harbor on Lake Ontario is to the northwest via County Route 72. According to the United States Census Bureau, the Henderson CDP has a total area of , all land. Demographics References Hamlets in New York (state) Census-designated places in New York (state) Census-designated places in Jefferson County, New York Hamlets in Jefferson County, New York