Duo (Latin for "two") can refer to:
Arts
- Duet (music), a musical piece performed by two people
- Duo, a musical ensemble composed of two musicians
- Comedy duo, also known as a double act
- Duo (Kenny Drew and Niels-Henning Ørsted Pedersen album), 1973
- Duo 2, Kenny Drew and Niels-Henning Ørsted Pedersen album, 1974
- Duo (Richard Marx and Matt Scannell album), 2008
- Duo (Peter Ostroushko and Dean Magraw album), 1991
- Duo (film), a 1996 independent film
- Duo (Mega Man), a fictional protagonist in the Capcom video game series Mega Man
- Duo Maxwell, a fictional protagonist in the television series Gundam Wing
- Duo (novel), a novel by Colette
- Pas de deux (film), a 1969 Canadian film also known as Duo
Technology
- Core 2 Duo, a computer processor from manufacturer Intel
- PowerBook Duo, a laptop computer from computer maker Apple
Other
- Duo, West Virginia
- Duo, a cocktail comprising a base spirit and a liqueur
- Duo Airways, a defunct UK airline
- Duo Interpretation, a speaking event