Cadfan

Cadfan or St Cadfan might refer to:


 * The Battle 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 name Cadfan
 * Saint Cadfan, founder of a monastery on Bardsey Island (6th century or 7th century floruit)
 * St Cadfan's Church, Tywyn in Mid Wales
 * The Cadfan Stone in the above church
 * St. Cadfan, a diesel locomotive on the Talyllyn Railway