Ceratonia siliqua, commonly known as the Carob tree and St John's-bread, is a species of flowering evergreen shrub or tree in the pea family, Fabaceae. It is widely cultivated for its edible legumes, and as an ornamental tree in gardens.

It is native to the Mediterranean region including Southern Europe, Northern Africa, the larger Mediterranean islands; to the Levant and Middle-East of Western Asia into Iran; and to the Canary Islands and Macaronesia.

The vernacular names in other cultures and languages for Ceratonia siliqua include: Arabic: خروب‎, kharrūb; German: Johannisbrotbaum; Greek: χαρουπιά, haroupia or ξυλοκερατιά, ksylokeratia ; Spanish: algarrobo, caroba; French: caroubier, caroube; Hebrew: חרוב‎ ḥaruv; Portuguese: alfarrobeira; Catalan: garrofa; Sicilian: carrubba; Turkish: harnup, keçiboynuzu; Croatian: rogač.