Twm or TWM may refer to:

• TWM, the default window manager for the X Window System

• Tanu Weds Manu, a 2011 Hindi romantic comedy film

• Tawang language (ISO-639: twm), spoken in India

• Teradata Warehouse Miner, data mining software

• Third World Media, an American pornographic film studio

• Tiling window manager, a class of window managers

• Tyne and Wear Metro

People

• Twm Carnabwth (1806–1876), Welsh rebel

• Twm Morys (born 1961), Welsh poet and musician

• Twm o'r Nant (1739–1810), Welsh-language dramatist and poet

• Twm Siôn Cati, a figure of Welsh folklore