New York State Route 312 (NY 312) is a short state highway connecting U.S. Route 6 (US 6) and NY 22 within the town of Southeast in Putnam County, New York. It allows indirect access to the village of Brewster from Interstate 84 (I-84), and is often heavily used by local residents at rush hour in preference to the more complicated nearby access to I-684. The western terminus of the route is at US 6 roughly 2 miles (3.2 km) northwest of Brewster, and the eastern is in the hamlet of Sears Corners.