Siege of Monemvasia can refer to one of the sieges of the fortress city of Monemvasia (Malvasia) in southeastern Greece:
Siege of Monemvasia (13th century), by the Principality of Achaea; the exact dating is disputed, with dates ranging from the early 1220s, to the late 1240s/early 1250s Siege of Monemvasia (1689–1690), by the Republic of Venice during the Morean War Siege of Monemvasia (1821), by the Greek rebels during the early stages of the Greek War of Independence