| Oswegatchie River | |
|---|---|
 Oswegatchie River access on Inlet Road | |
  Location of the mouth  Oswegatchie River (the United States) | |
| Native name | Kaniatarahòn:tsi (Mohawk) |
| Location | |
| Country | United States |
| State | New York |
| Region | Adirondack Mountains |
| Counties | St. Lawrence, Jefferson, Herkimer, Hamilton |
| Physical characteristics | |
| Source | |
| • coordinates | 44°01′13″N 74°49′26″W / 44.0203396°N 74.8237923°W |
| Mouth | Saint Lawrence River |
• location | Ogdensburg |
• coordinates | 44°41′45″N 75°29′51″W / 44.6958958°N 75.4974483°W |
• elevation | 243 ft (74 m) |
| Length | 137 mi (220 km) |
| Basin size | 1,592 sq mi (4,120 km2) |
| Basin features | |
| Tributaries | |
| • left | West Branch Oswegatchie River, Black Lake |
The Oswegatchie River is a 137-mile-long (220 km)[1] river in northern New York that flows from the Adirondack Mountains north to the Saint Lawrence River. The Oswegatchie River begins at Partlow Lake in Hamilton County, New York. The river continues through Cranberry Lake which was 'doubled in size' through construction of a dam in the late 1860s. The river continues from the dam to Gouverneur, to near Talcville in St. Lawrence County, where it joins the West Branch. Much of it is within Adirondack State Park. The city of Ogdensburg developed at the mouth of the river at its confluence with the St. Lawrence.
- ^ "The National Map". U.S. Geological Survey. Archived from the original on 2012-03-29. Retrieved Feb 11, 2011.