| Beatriz Pereira de Alvim | |
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| Born | 1380 |
| Died | 1415 Chaves |
| Spouse | Afonso, Count of Barcelos |
| Father | Nuno Álvares Pereira |
| Mother | Leonor de Alvim |
Beatriz Pereira de Alvim (1380–1415) 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.