| State: | SON |
| Type: | SH |
| Route: | 40 |
| Terminus A: | San Luis Rio Colorado |
| Terminus B: | Golfo de Santa Clara |
Sonora State Highway 40 (Carretera Estatal 40) is a highway in the north-west of the Mexican state of Sonora.
It runs from San Luis Rio Colorado to Golfo de Santa Clara. [1]