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.