New York State Route 812

New York State Route 812
Map of northern New York with NY 812 highlighted in red
Route information
Maintained by NYSDOT and the Ogdensburg Bridge and Port Authority
Length:	80.91 mi (130.21 km)
Existed:	June 1978 – present
Major junctions
South end:	NY 12 / NY 26 in Lowville
	NY 3 in Harrisville US 11 / NY 58 in Gouverneur NY 37 in Ogdensburg
North end:	Highway 16 at the Canadian border in Ogdensburg
Location
Counties:	Lewis, St. Lawrence
Highway system
New York Highways Interstate U.S. State Reference Parkways ← I-790 NY 825 → ← I-87 NY 87 I-88 →

New York State Route 812 (NY 812) is a state highway in the North Country of New York in the United States. The southern terminus of the route is at an intersection with NY 12 and NY 26 in the Lewis County village of Lowville. Its northern terminus is at the Canada–United States border in Ogdensburg, where it crosses the Ogdensburg–Prescott International Bridge and connects to Highway 16 in Ontario. While most of NY 812 passes through rural areas of the North Country, the route also serves several villages and small communities.

The origins of NY 812 date back to the 1930 renumbering of state highways in New York, when the portion of modern NY 812 from Lowville to Croghan became part of NY 26A and the segment of modern NY 812 between De Kalb and Ogdensburg was designated as the northernmost portion of New York State Route 87. NY 87 originally extended as far south as Harrisville; however, it was truncated north to Edwards in the 1940s and farther north to De Kalb in the 1970s.