Decima can refer to:
*
Decima gallery, a London-based arts organisation
*
Decima (game engine), a proprietary game engine by Guerrilla Games
*
Decima (mythology)
In Roman mythology, Decima was one of the three Parcae, or often known in English as the Fates. Nona and Decima were responsible for birth, while Morta was charged with overseeing death. They distributed to mankind all the good and bad things in ...
, a goddess in Roman mythology and one of the Parcae (Fates)
*
Decima Research, a Canadian polling company
*
Décima, a type of poetry with ten stanzas, rooted in Spanish literature
* Décima, the one-tenth tithe in Spain that is traditionally donated to a religious institution, the tithe itself called ''
diezmo'' in Spanish
*
Dejima, a foreign trading post off the coast of Nagasaki, Japan, during the 16th to 19th century
*
SB Decima, a Thames barge built in 1899
* The Decimas, a race of fictional creatures in the British science-fiction television series ''
Blake's 7''
*
Decima Flottiglia MAS, an Italian flotilla, with commando frogman unit, of the Regia Marina (Italian Royal Navy) created during the Fascist regime
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