The Senate of the entire People of the Peloponnese provinces (Greek: Γερουσία όλου του Δήμου των επαρχιών της Πελοποννήσου), commonly known as the Peloponnesian Senate (Πελοποννησιακή Γερουσία), was a provisional regime that existed in the Peloponnese during the early stages of the Greek War of Independence.

On 25 March 1821 (all the dates are given according to the Julian calendar), a few days after the outbreak of the Greek War of Independence in March 1821, the rebels of the southern Peloponnese, led by the Maniots, assembled at Kalamata and founded the Greek rebels' first organ of government, the Messenian Senate.

As the uprising spread through Greece, the Messenian Senate's leader, Petrobey Mavromichalis, invited representatives from the rest of the Peloponnese in an assembly held at the Kaltetza Monastery.

Sotirios Charalambis, Athanasios Kanakaris, Anagnostis Deligiannis, Theocharis Rentis and Nikolaos Poniropoulos were members.

The Peloponnesian Senate continued in existence (with Asimakis Fotilas as president after February 1822) until it was dissolved by the Second National Assembly at Astros in April 1823.