The Oswegatchie River is located in the northern part of New York in the USA. The river is a tributary of the St. Lawrence River.
The Oswegatchie enters the St. Lawrence at the City of Ogdensburg. The East Branch of the Oswegatchie River, regarded as the main branch, begins in Hamilton County, New York.
The lower part of the river, between Gouverneur and Ogdensburg is slow moving with some rapids that can be handled by experienced canoists.
