Cyd is a given name, and may refer to:
Cyd Charisse (born Tula Ellice Finklea; March 8, 1922 – June 17, 2008) was an American actress and dancer.
Cydia /sɪˈdi.ə/ is a package manager mobile app for iOS that enables a user to find and install software packages on jailbroken iPhones, iPads and iPods.
Cydonia (/sᵻˈdoʊniə/, /saɪˈdoʊniə/) is a region on the planet Mars that has attracted both scientific and popular interest.
"Lasperesia" and "Lespeyresia" redirect here. These are misspellings of Laspeyresia, which was invalidly established for the genus Cydia and actually refers to the noctuid moth genus Laspeyria.
Cydalima perspectalis or the box tree moth is a species of moth of the family Crambidae. It is native to eastern Asia (Japan, China, Taiwan, Korea, the Russian Far East and India).
Cyd Ho Sau-lan (Chinese: 何秀蘭) is a former member of the Legislative Council of Hong Kong (Legco) for the Hong Kong Island constituency.
Cydthealee Alivio Demecillo (born December 2, 1993) is a Filipina volleyball athlete. She three times won the UAAP College titles in indoor volleball and won the 2016 Philippine Super Liga All-Filipino Conference with the club F2 Logistics Cargo Movers.
Cydonia is the fifth studio album by the Orb, released on Island Records in the UK and MCA Records in the US.
Cydamus (Berber: Tidamensi), also known as Cidamus, was a Roman-Berber city in present-day Ghadames, Libya.