New York State Route 306 (NY 306) is a north–south state highway in western Rockland County, New York, in the United States. NY 306 runs from NY 59 in the hamlet of Monsey to U.S. Route 202 (US 202) in Ladentown, on the western boundary of the village of Pomona. The road is currently 5.33 miles (8.58 km) long; however, it originally extended south to the New Jersey state line and north to Willow Grove Road (former NY 210) when it was assigned as part of the 1930 renumbering of state highways in New York.