New York State Route 189 (NY 189) is a north–south state highway located near the northern border of New York in the United States. It extends for 5.70 miles (9.17 km) through the Clinton County town of Clinton from a junction with U.S. Route 11 (US 11) to the Canada–US border, where it continues into Quebec as Route 209. In between, the two-lane NY 189 serves the small hamlet of Churubusco. Outside of Churubusco, the highway passes through rural, undeveloped areas. NY 189 was assigned to its current alignment as part of the 1930 renumbering of state highways in New York and has remained untouched since.