| Beatriz Pereira de Alvim | |
| Father: | Nuno Álvares Pereira |
| Mother: | Leonor de Alvim |
| Spouse: | Afonso, Count of Barcelos |
| Birth Date: | 1380 |
| Death Date: | 1414 |
| Death Place: | Chaves |
Beatriz Pereira de Alvim (1380–1414) was a Portuguese noblewoman, the only child of Nuno Álvares Pereira and his wife Leonor de Alvim.
On 8 November 1401, she married Afonso, Count of Barcelos, illegitimate son of king John I of Portugal. She died before her husband became Duke of Braganza.
Afonso and Beatriz had three children.