Prince Edward Island Route 142, known locally as O'Leary Road, is a 2-lane highway in Prince County, Prince Edward Island, Canada.

The highway bisects the island approximately halfway between Summerside and Tignish, and passes through the town of O'Leary.

At Woodstock, the road meets Route 2 at a roundabout, then continues to O'Leary.

The remainder of the route is designated a local highway.

[2] This Prince Edward Island road, road transport or highway-related article is a stub.