| Official Name: | Madrid, New York |
| Settlement Type: | Census-designated place |
| Pushpin Map: | New York#USA |
| Pushpin Label: | Madrid |
| Coordinates: | 44.7489°N -75.1317°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | New York |
| Subdivision Type2: | County |
| Subdivision Name2: | St. Lawrence |
| Subdivision Type3: | Town |
| Subdivision Name3: | Madrid |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 3.86 |
| Area Land Sq Mi: | 3.73 |
| Area Water Sq Mi: | 0.13 |
| Area Total Km2: | 10.00 |
| Area Land Km2: | 9.65 |
| Area Water Km2: | 0.35 |
| Population As Of: | 2020 |
| Population Density Km2: | 76.24 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 320 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 13660 |
| Area Code: | 315/680 |
| Blank Name: | FIPS code |
| Blank Info: | 36-44479 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2627948 |
| Population Total: | 736 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 197.48 |
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 to Massena and southwest to Canton. State Route 345 crosses NY 310 south of the center of the hamlet. It leads north-northwest 9miles to Waddington on the St. Lawrence River and southeast 10miles to Potsdam.
The Grass River, a tributary of the St. Lawrence River, flows northeastward through the center of Madrid.