| Alhfrith | |
|---|---|
| King of Deira | |
| Reign | 655–664 AD |
| Predecessor | Æthelwold |
| Successor | Ecgfrith |
| Born | c. 630 |
| Died | c. 664 |
| Consort | Cyneburh |
| Issue | Rumwold? |
| Father | Oswiu |
| Mother | Rieinmelth |
Alhfrith or Ealhfrith (c. 630 – c. 664) was King of Deira under his father Oswiu, King of Bernicia, from 655 until sometime after 664. Appointed by Oswiu as a subordinate ruler, Alhfrith apparently clashed with his father over religious policy, which came to a head at the Synod of Whitby in 664. After this, Alhfrith disappears from the historical record.