Agis or AGIS may refer to:
People Agis I (died 900 BC), Spartan king Agis II (died 401 BC), Spartan king Agis III (died 331 BC), Spartan king Agis IV (265–241 BC), Spartan king Agis (Paeonian) (died 358 BC), King of the Paeonians Agis of Argos, ancient Greek poet Maurice Agis (1931–2009), British sculptor and artist
Other uses Agis (play), by John Home Agis, several fictional emperors of Isaac Asimov's Galactic Empire Apex Global Internet Services Atomic gravitational wave interferometric sensor Advanced Glaucoma Intervention Study, conducted by the National Eye Institute
See also Agide (disambiguation), modern Italian given name related to Agis