| Castell'Anselmo | |
| Coordinates: | 43.5536°N 10.4667°W |
| Province: | Livorno (LI) |
| Comune: | Collesalvetti |
| Elevation M: | 132 |
| Population Total: | 234 |
| Population As Of: | 2011 |
| Postal Code: | 57017 |
| Area Code: | (+39) 0565 |
Castell'Anselmo is a village in Tuscany, central Italy, administratively a frazione of the comune of Collesalvetti, province of Livorno. At the time of the 2011 census its population was 234.
The village is about 16 km from Livorno and 5 km from Collesalvetti.