| Country: | CRI |
| Type: | Tertiary |
| Route: | 612 |
| Map Custom: | yes |
| Direction A: | South |
| Terminus A: | |
| Direction B: | North |
| Terminus B: | Santa Elena |
| Provinces: | Puntarenas |
| Length Km: | 31.470 |
| Length Round: | 2 |
| Previous Type: | RNT |
| Previous Route: | 611 |
| Next Type: | RNT |
| Next Route: | 613 |
National Tertiary Route 612, or just Route 612 (es|Ruta Nacional Terciaria 612, or Spanish; Castilian: Ruta 612) is a National Road Route of Costa Rica, located in the Puntarenas province.[1] In Puntarenas province the route covers Coto Brus canton (San Vito, Pittier, Gutiérrez Braun districts). As the main road between San Vito town and Elena town on Pittier district, MOPT announced on 22 October 2020 works to improve the road for a total of CRC ₡ 2,988,388,595.20 over 164 days.[2]