| State: | PR |
| Type: | PR |
| Route: | 591 |
| Maint: | Puerto Rico DTPW |
| Length Km: | 3.1 |
| Direction A: | West |
| Terminus A: | in Canas |
| Direction B: | East |
| Terminus B: | in Canas |
| Municipalities: | Ponce |
| Previous Type: | Ter |
| Previous Route: | 588 |
| Next Type: | Ter |
| Next Route: | 633 |
Puerto Rico Highway 591 (PR-591) is tertiary[1] highway in Ponce, Puerto Rico. The road is located at the El Tuque sector of Barrio Canas.