New York State Route 31F

New York State Route 31F (NY 31F) is an east–west state highway located in the vicinity of Rochester, New York, in the United States. The western terminus of the route is at an intersection with NY 96 north of the Monroe County village of Pittsford. Its eastern terminus is at a junction with NY 31 in the Wayne County village of Macedon. Along the way, NY 31F serves the villages of East Rochester and Fairport and connects to Interstate 490 (I-490) in the town of Pittsford. From Fairport eastward, NY 31F roughly parallels the Erie Canal, which the route crosses over twice: once west of Fairport and again north of Macedon.

The origins of NY 31F date back to 1908 when the modern alignment of the route was designated as part of Route 20 by the New York State Legislature. Route 20, an unsigned legislative route, was rerouted in 1921 to use NY 31 and NY 250 between Macedon and Fairport instead. The section of Route 20's pre-1921 alignment west of modern NY 350 received a designation c. 1931 when it became part of New York State Route 33B, an alternate route of NY 33 (now NY 441) that extended from Pittsford to Walworth via Macedon Center. NY 33 was truncated to end in Rochester in 1949, at which time NY 33B was renumbered to NY 31F and rerouted to end in Macedon.