Mallow is the common name of several closely related genera of plant in the family Malvaceae:

• Althaea – Marsh mallow
• Callirhoe – Poppy mallow
• Kosteletzkya – Seashore mallow
• Lavatera – Tree mallow or rose mallow
• Malacothamnus – Santa Cruz Island bush-mallow
• Malva – Mallow
• Malvaviscus – Turk's cap mallow
• Sidalcea – Greek mallow
• Sphaeralcea – Globemallow

Plants of the genus Malva are herbaceous perennials; the other genera include annuals, herbaceous perennials, sub-shrubs, shrubs, and small trees (including hibiscus). Several mallows are of horticultural merit. Some have other economic uses, although none is a major crop plant.

Mallow may also refer to:

• marshmallow, a sweet originally made from the marsh mallow
• the Malvi language of the Malwa region of India
• a Greek oracle founded by Amphilochus
• Mallow, County Cork, a place in southern Ireland
• Mallow (Super Mario RPG), a playable character in the game Super Mario RPG
• the NATO codename for the Soviet Beriev Be-10 jet-engined flying boat