Alvito (Portuguese pronunciation: [alˈvitu] ⓘ) is a town and a municipality in Beja District in Portugal.

The Alvito region has been inhabited since the Neolithic, and during the period of Roman domination several villae were established nearby, later occupied by Visigoths and Moors.

During the Reconquista, Alvito was conquered by the Portuguese in 1234, being later (1251) donated by King Afonso III to Estêvão Anes, chancellor of the kingdom, who promoted the settlement of the area.

The village gained a foral (letter of feudal rights) in 1280, confirmed by King Dinis I in 1283.

The Castle of Alvito was rebuilt between 1494 and 1504, and its architecture and decoration show an interesting mix of Manueline (Portuguese late Gothic) and Mudéjar (Arab-influenced) styles, typical of the Alentejo region.