Saskatchewan Highway 42

Highway 42 is a provincial highway in the Canadian province of Saskatchewan. It runs from the intersection of Highway 2 in Tuxford in a north-west direction to Highway 15 near Milden. Even though the section between Lucky Lake and Milden is predominantly north–south, the entirety of Hwy 42 is signed east–west. The highway is about 205 kilometres (127 mi) long.

Highway 42 passes by the communities of Marquis, Keeler, Brownlee, Eyebrow, Central Butte, Lawson, Riverhurst, Lucky Lake, and Dinsmore, Saskatchewan. It crosses Lake Diefenbaker on the 1.5-kilometre (0.93 mi) long Riverhurst Ferry route. That crossing is an ice road in the winter.