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.