Puerto Rico Highway 121
| Ruta 121 | ||||
| Route information | ||||
| Maintained by Puerto Rico DTPW | ||||
| Length | 15.4 km (9.6 mi) | |||
| Major junctions | ||||
| West end | PR-102 / PR-368 in Sabana Grande barrio-pueblo | |||
| East end | PR-127 / PR-128 in Susúa Baja | |||
| Location | ||||
| Country | United States | |||
| Territory | Puerto Rico | |||
| Municipalities | Sabana Grande, Yauco | |||
| Highway system | ||||
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Puerto Rico Highway 121 (PR-121) is a road that travels from Sabana Grande, Puerto Rico to Yauco. This highway begins at its intersection with PR-102 and PR-368 in downtown Sabana Grande and ends at its junction with PR-127 and PR-128 in Susúa Baja.