| Joanna of Portugal | |
|---|---|
| Hereditary Princess of Portugal | |
 | |
| Born | 6 February 1452 Lisbon, Portugal |
| Died | 12 May 1490 (aged 38) Aveiro, Portugal |
| Burial | Convent of Jesus in Aveiro |
| House | Aviz |
| Father | Afonso V of Portugal |
| Mother | Isabel of Coimbra |
| Religion | Catholicism |
Blessed Joana de Portugal | |
|---|---|
 | |
| Venerated in | Roman Catholic Church |
| Beatified | 16 February 1692, Saint Peter's Basilica, Papal States by Pope Innocent XII |
| Feast | 12 May |
Joanna of Portugal, OP (6 February 1452 – 12 May 1490; Portuguese: Joana, Portuguese pronunciation: [ˈsɐ̃tɐ ʒuˈɐnɐ pɾĩˈsezɐ]) was a Portuguese regent princess of the House of Aviz, daughter of King Afonso V of Portugal and his first wife Isabel of Coimbra. She served as regent during the absence of her father in 1471. She is venerated in the Catholic Church and known commonly in Portugal as Princess Saint Joan (Portuguese: Santa Joana Princesa).