Madrid (CDP), New York

Madrid is the primary hamlet and a census-designated place (CDP) in the town of Madrid in St. Lawrence County, New York, United States. At the 2020 census, it had a population of 736, out of 1,735 in the entire town of Madrid.

The community is in northern St. Lawrence County, south of the center of the town of Madrid. New York State Route 310 runs through Madrid, leading northeast 20 mi to Massena and southwest 11 mi to Canton. State Route 345 crosses NY 310 south of the center of the hamlet. It leads north-northwest 9 mi to Waddington on the St. Lawrence River and southeast 10 mi to Potsdam.

The Grass River, a tributary of the St. Lawrence River, flows northeastward through the center of Madrid.