New York State Route 284

New York State Route 284 (NY 284) is a north–south state highway located entirely within Orange County, New York, in the United States. It begins just south of the village of Unionville at the New Jersey state line in the town of Minisink, where it connects to that state's Route 284. From Unionville, the route heads through rural parts of Orange County for just over 9 miles (14 km) to an intersection with U.S. Route 6 (US 6) in the hamlet of Slate Hill, located 5 miles (8.0 km) southwest of the city of Middletown in the town of Wawayanda.

The highway has been part of a state route since 1924 when it became part of New York State Route 8, a road continuing northeast through Middletown and Montgomery to Newburgh. NY 8 was split into two routes as part of the 1930 renumbering of state highways in New York, with the portion of the highway south of Montgomery becoming New York State Route 84. When Interstate 84 (I-84) was built along a similar alignment to NY 84 in the mid-1960s, the state route was renumbered again to prevent confusion between the two roads. The section of NY 84 south of Slate Hill was redesignated as NY 284 while the rest of the highway was absorbed by other, pre-existing routes.