| Country: | BRA |
| Alternate Name: | Rodovia Euclides da Cunha |
| State: | SP |
| Type: | SP |
| Route: | 320 |
| Junction: | SP-310 SP-377 SP-479 SP-461 SP-527 SP-543 SP-463 SP-561 SP-595 |
| Direction A: | East |
| Terminus A: | Mirassol, SP |
| Direction B: | West |
| Terminus B: | Rubinéia, SP |
Rodovia Euclides da Cunha (official denomination SP-320) is a state highway in the state of São Paulo. The highway is named after Brazilian writer Euclides da Cunha.
The highway begins in Mirassol, on the SP-310, and ends in the city of Rubinéia, at the Paraná river, where it connects with the state of Mato Grosso do Sul by a road-rail bridge.