New York State Route 243 (NY 243) is a 11.03-mile (17.75 km) east–west state highway in the Southern Tier of New York in the United States. It begins at an intersection with NY 98 in the town of Freedom and proceeds southeastward across mostly rural areas of Cattaraugus and Allegany counties to Rushford Lake. From here, the highway turns eastward into the town of Caneadea, where it ends at a junction with NY 19.