| Province: | NB |
| Type: | NB |
| Route: | 118 |
| Maint: | New Brunswick Department of Transportation |
| Length Km: | 40.12 |
| Length Ref: | [1] |
| Length Round: | 1 |
| Established: | 1965.[2] |
| Direction A: | North |
| Direction B: | South |
| Terminus A: | in Miramichi |
| Cities: | Miramichi, South Nelson |
| Terminus B: | in Miramichi River Valley |
| Previous Type: | NB |
| Previous Route: | 117 |
| Next Type: | NB |
| Next Route: | 119 |
Route 118 is a North/South provincial highway in the Canadian province of New Brunswick. The road runs from Route 126 intersection in Miramichi. The road has a length of approximately 40 kilometres, and services small, otherwise isolated rural communities. In these areas, the highway is often unofficially referred to as "Main Street." The road parallels the Miramichi River as well as Route 108 and later Route 8 directly to the North side of the river. The highway starts in Miramichi as Islandview Drive. The Highway starts next to Beaubears Island later passing Barnaby Island and lastly Doctors Island. In Miramichi River Valley, the Highway changes to Colonial Drive and lastly Campbell Road.
Route 118 was commissioned in 1965 to replace the former route 36.