| Country: | CRI |
| Type: | Tertiary |
| Route: | 621 |
| Map Custom: | yes --> |
| Direction A: | NORTH/SOUTH/EAST/WEST? |
| Direction B: | NORTH/SOUTH/EAST/WEST? |
| Terminus B: | --> |
| Provinces: | Puntarenas |
| Length Km: | 4.165 |
| Length Round: | 2 |
| Previous Type: | RNT |
| Previous Route: | 620 |
| Next Type: | RNT |
| Next Route: | 622 |
National Tertiary Route 621, or just Route 621 (Spanish; Castilian: Ruta Nacional Terciaria 621, or Spanish; Castilian: Ruta 621) is a National Road Route of Costa Rica, located in the Puntarenas province.[1]
In Puntarenas province the route covers Puntarenas canton (Paquera district).