| Infante Afonso | |
| Lord of Portalegre | |
| Spouse: | Violante Manuel |
| Issue: | See Issue |
| House: | Portuguese House of Burgundy |
| Father: | Afonso III |
| Mother: | Beatrice of Castile |
| Birth Date: | 8 February 1263 |
| Birth Place: | Lisbon, Kingdom of Portugal |
| Death Place: | Lisbon, Kingdom of Portugal |
| Burial Place: | Dominican monastery, Lisbon, Portugal |
Infante Afonso of Portugal (8 February 1263, in Lisbon – 2 November 1312, in Lisbon;[1] pronounced as /pt/; or Alphonse) was a Portuguese infante (prince), the second son of King Afonso III of Portugal and his second wife Beatrice of Castile.[2] He was titled Lord of Portalegre, Castelo de Vide, Arronches, Marvão[3] and Lourinhã.
Afonso was born on 8 February 1263 and in 1287 married Violante Manuel, daughter of Castilian Infante Manuel of Castile.
Afonso died on 2 November 1312 in Lisbon.
By his wife Violante Manuel he had five children: