| Margaret of Prades | |
| Succession: | Queen of Aragon |
| Reign: | 17 September 1409 – 31 March 1410 |
| Birth Date: | 1388/95 |
| Birth Place: | Falset |
| Death Date: | 23 July 1429 |
| Death Place: | Riudoms |
| Burial Place: | Santes Creus |
| Consort: | yes |
| Spouse: | Martin of Aragon John of Vilaragut |
| Issue: | Joan Jeroni de Vilaragut |
| Father: | Peter of Aragon, Baron of Entenza |
| Mother: | Joana of Cabrera |
Margaret of Prades (1388/95 – 23 July 1429) was Queen of Aragon by marriage to King Martin of Aragon.[1]
She was the daughter of Peter of Aragon, Baron of Entenza (1352–1395), and his wife, Joana of Cabrera.On 17 September 1409, Margaret married Martin of Catalonia-Aragon, a second cousin of her father. The bride was about fourteen years old and the groom fifty-three. Martin had survived all his legitimate children from his first marriage with Maria de Luna and was in need of a legitimate heir of his own. On 31 March 1410, Martin I died after six months of marriage. They had no children. His death led to a two-year interregnum, which was ended by the Pact of Caspe, in which Ferdinand I of Aragon, younger son of his sister Eleanor, was chosen as the next king.
Margaret remained a widow for about four years. She married her second husband John of Vilaragut in 1415. In secret, she gave birth to a son in 1416, whose name was Joan Jeroni de Vilaragut (1416–1452).[2] John died in 1422 and Margaret entered the monastery of Bonrepòs. She died in 1429.