Tsez language (also known as Dido), a Northeast Caucasian language

Dido was the founder and first queen of Carthage. Dido may also refer to:

Dido Armstrong (born 1971), a pop singer

Dido and Aeneas, an opera by Henry Percell, based on the play by Marlowe.

Helleborus Dido, a cultivar of the hellebore plant (described by Country Life as "dusky, double and demurely ruffled as a tutu": 9 February 2007)

DIDO, a software package to solve optimal control problems

Dido, a character from Matthew Reilly's science fiction novel Hover Car Racer

Dido flip, her eponymous hairstyle

Dido, Queen of Carthage, a play by Christopher Marlowe

Dido (1860 - 1877), one of the eight South Devon Railway Dido class steam locomotives

209 Dido, a very large main-belt asteroid

HMS Dido, the name of seven British Royal Navy vessels

Philaethria dido, also known as the Scarce Bamboo Page, a butterfly of the Heliconian family

Fido Dido, a cartoon character licensed to Pepsico for their 7UP brand

DIDO, a nuclear reactor

One of the planets in the long-running Doctor Who television series

Dido Elizabeth Belle, black daughter of John Lindsay