Isaris (Greek: Ίσαρης) is a village and a community in the municipality of Megalopoli, Arcadia, Greece.
It is situated in the mountains west of the Alfeios valley, at about 750 m elevation.
It is considered a traditional settlement.
It is 2 km east of Vastas, 5 km northwest of Chranoi and 11 km southwest of Megalopoli.
The community includes the small villages Petrovouni and Chrousa.