The Bey of Mani (Greek: Μπέης της Μάνης), in Greek often referred to as the Prince of Mani (Ηγεμόνας της Μάνης), was the ruler of the Mani Peninsula, an autonomous region under the Ottoman Empire. The post was established after the suppression of the Orlov Revolt, when Mani's autonomy and privileges were recognized by the Sultan, and the peninsula placed under the supervision of the Kapudan Pasha. This situation lasted until the outbreak of the Greek War of Independence in 1821, in which the then bey, Petrobey Mavromichalis, played a leading role.

The bey was always drawn from one of the local magnate clans:^[1]