New York State Route 320 (NY 320) is an east–west state highway located within Chenango County in the central part of New York in the United States. It extends for 3.55 miles (5.71 km) from an intersection with NY 12 north of the city of Norwich to a junction with Tiffany Road in the town of North Norwich. The road shifts from state to county maintenance at the latter junction, and NY 320's right-of-way continues northeast from Tiffany Road as County Route 29 (CR 29).