The following highways are numbered 33B:
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 hamlet 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.