Joseph Albo (Hebrew: יוסף אלבו; c. 1380–1444) was a Jewish philosopher and rabbi who lived in Spain during the fifteenth century, known chiefly as the author of Sefer ha-Ikkarim ("Book of Principles"), the classic work on the fundamentals of Judaism.
Albo's birthplace is generally assumed to be Monreal del Campo, a town in Aragon.
This is based on Astruc ha-Levi's report of the religious debate held at Tortosa in 1413-14, which mentions Albo as one of the Jewish participants and notes he was the delegate of the congregation of Monreal.
Opinions vary on whether Crescas was still alive when Sefer HaIkkarim was published.
Albo is best known for his philosophical work, Sefer ha-Ikkarim ("Book of Principles"), completed in 1425 in Soria.