| Castissent | |
| Settlement Type: | Locality |
| Pushpin Map: | Spain Province of Lleida#Spain Catalonia#Spain |
| Pushpin Label: | Castissent |
| Pushpin Label Position: | left |
| Subdivision Type: | Country |
| Subdivision Type1: | Community |
| Subdivision Type2: | Province |
| Subdivision Name2: | Lleida |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Tremp |
| Population Total: | 18 |
| Coordinates: | 42.1261°N 0.71°W[1] |
| Elevation M: | 658 |
| Postal Code Type: | Postal code |
Castissent is a hamlet located in the municipality of Tremp, in Province of Lleida province, Catalonia, Spain. As of 2020, it has a population of 18.[2]
Castissent is located 93km north of Lleida.