CadfanorSt Cadfanmight refer to:
- TheBattle of Cadfan,fought between English and Welsh armies in 1257
- Cadfan ap Iago,King of Gwynedd (7th century floruit)
- John Cadvan Davies(1846–1923), Archdruid of Wales, used the bardic nameCadfan
- Saint Cadfan,founder of a monastery on Bardsey Island (6th century or 7th century floruit)
- St Cadfan's Church, Tywynin Mid Wales
- TheCadfan Stonein the above church
- St. Cadfan,a diesel locomotive on theTalyllyn Railway