| Country: | CRI |
| Type: | Tertiary |
| Route: | 931 |
| Map Custom: | yes --> |
| Direction A: | NORTH/SOUTH/EAST/WEST? |
| Direction B: | NORTH/SOUTH/EAST/WEST? |
| Terminus B: | --> |
| Provinces: | Guanacaste |
| Length Km: | 15.325 |
| Length Round: | 2 |
| Previous Type: | RNT |
| Previous Route: | 930 |
| Next Type: | RNT |
| Next Route: | 933 |
National Tertiary Route 931, or just Route 931 (Spanish; Castilian: Ruta Nacional Terciaria 931, or Spanish; Castilian: Ruta 931) is a National Road Route of Costa Rica, located in the Guanacaste province.[1]
In Guanacaste province the route covers Nicoya canton (San Antonio district), Santa Cruz canton (Santa Cruz, Diriá districts).