| Official Name: | Winthrop, New York |
| Settlement Type: | Census-designated place |
| Pushpin Map: | New York#USA |
| Pushpin Label: | Winthrop |
| Pushpin Label Position: | bottom |
| Coordinates: | 44.7956°N -74.7858°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: | Stockholm |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 2.80 |
| Area Land Sq Mi: | 2.78 |
| Area Water Sq Mi: | 0.02 |
| Area Total Km2: | 7.25 |
| Area Land Km2: | 7.19 |
| Area Water Km2: | 0.06 |
| Population As Of: | 2020 |
| Population Density Km2: | 68.00 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 338 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 13697 13613 (Brasher Falls) |
| Area Code: | 315/680 |
| Blank Name: | FIPS code |
| Blank Info: | 36-82612 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2584303 |
| Population Total: | 489 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 176.09 |
Winthrop is a hamlet and census-designated place (CDP) in the town of Stockholm in St. Lawrence County, New York, United States. As of the 2010 census, it had a population of 510.
The community is in northeastern St. Lawrence County, in the northeastern part of the town of Stockholm. It is bordered to the northeast by the community of Brasher Falls in the town of Brasher. The St. Regis River, a tributary of the St. Lawrence River, forms the southeastern border.
New York State Route 11C passes through Winthrop, leading southwest 3miles to U.S. Route 11 at Stockholm Center, and looping northeast, east, and south 8miles to rejoin Route 11 at Cotey Corners in the town of Lawrence. The village of Potsdam is southwest of Winthrop. State Route 420 crosses NY 11C in the center of Winthrop; it leads north-northwest 11miles to Massena and south to US-11.
The school district is Brasher Falls Central School District.[2]