| Province: | NB |
| Type: | NB |
| Route: | 120 |
| Maint: | New Brunswick Department of Transportation |
| Length Km: | 45 |
| Length Ref: | [1] [2] |
| Length Round: | 1 |
| Established: | 1965 |
| Direction A: | West |
| Direction B: | East |
| Terminus A: | at Saint-Jean-de-la-Lande, Quebec |
| Cities: | Baker Brook, Edmundston |
| Junction: | in Clair in Edmundston |
| Terminus B: | in Edmundston |
| Previous Type: | NB |
| Previous Route: | 119 |
| Next Type: | NB |
| Next Route: | 121 |
Route 120 is a New Brunswick highway in Madawaska County that runs from a junction with Quebec Route 289 at Saint-Jean-de-la-Lande, Quebec, to New Brunswick Route 2 in Edmundston.