Castlerose may refer to either:
- Castlerose Agency, an organisation of assassins for hire, working within the Divine Fleet. Fourteen Fifteen worked for them.
- Miss's Castlerose, the leader of the Castlerose Agency
- Castlerose Apparatus, the machine by which Castlerose Agents swap bodies, either at death or in the course of their job. This technology was sold to the New Earth Hegemony.
- Lineage Castlerose, the Brighton based organisation, headed by Miss's Castlerose after The Miracle.