| State: | ND |
| Type: | ND |
| Route: | 42 |
| Maint: | NDDOT |
| Map Custom: | yes |
| Length Mi: | 37.441 |
| Length Round: | 3 |
| Length Ref: | [1] |
| Established: | 1927 |
| Direction A: | South |
| Junction: | in Crosby |
| Direction B: | North |
| Terminus B: | at the Canada–United States border |
| Counties: | Divide |
| Previous Type: | ND |
| Previous Route: | 41 |
| Next Type: | ND |
| Next Route: | 43 |
North Dakota Highway 42 (ND 42) is a north–south highway located in northwestern North Dakota. The highway traverses northern Williams and Divide Counties. The southern terminus is at ND 50 near Corinth and the northern terminus is a continuation as Saskatchewan Highway 350 (Hwy 350) at the Canadian border.[2]
ND 42 begins at a junction with ND 50 near the small town of Corinth, in northern Williams County. After going through town, it enters Divide County, and meets ND 5 in the county seat, Crosby. For, ND 42 runs concurrently with ND 5 from Crosby to just south of Ambrose. ND 42 turns northward to end at the Canadian border.[3] The roadway continues northward beyond the Ambrose–Torquay Border Crossing and port of entry as Hwy 350, south of Torquay, Saskatchewan.[4] [5]
From 1926 to 1927, ND 42 was previously designated onto an alignment now designated as ND 37.