| Sant Vicenç de Castellet | |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain Catalonia vegueries#Spain |
| Coordinates: | 41.6678°N 1.8633°W |
| Subdivision Type: | Sovereign state |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Community |
| Subdivision Type2: | Region |
| Subdivision Name2: | Centre |
| Subdivision Type3: | County |
| Subdivision Name3: | Bages |
| Subdivision Type4: | Province |
| Subdivision Name4: | Barcelona |
| Leader Title: | Mayor |
| Leader Name: | Daniel Mauriz i Vidal (2023) (JxC)[1] |
| Area Footnotes: | [2] |
| Area Total Km2: | 17.1 |
| Elevation M: | 176 |
| Population Density Km2: | auto |
| Population Demonym: | Santvicentí, santvicentina |
Sant Vicenç de Castellet (in Catalan; Valencian sam biˈsɛnz ðə kəs.təˈʎɛt/) is a municipality in Bages county in Catalonia, Spain. It is situated near the confluence of the Llobregat river and the Cardener river. The two railway stations, in close proximity to each other, serve the FGC line R5 between Barcelona and Manresa, and the Renfe line between Barcelona and Zaragoza via Manresa and Lleida, served by Rodalies lines R4 and R12. The C-1411 road links the municipality with Martorell and Manresa.
The ruins of both the Castellet castle and of a Roman tomb (third century, known locally as la Torre del Breny) are visible.
| Pop 1900: | 1429 |
| Pop 1930: | 3094 |
| Pop 1950: | 4008 |
| Pop 1970: | 6831 |
| Pop 1986: | 7625 |
| Pop Latest: | 8096 |
| Latest Year: | 2007 |