Roupaki () is a community in the municipal unit of Gastouni, Elis, Greece. It is situated in a flat, rural area, south of the river Pineios. It is 2 km southeast of Agia Mavra, 2 km west of Sosti, 2 km east of Koroivos, 6 km east of Gastouni and 8 km northwest of Amaliada.
Historical population
{| class=wikitable
! Year !! Population
|-----
| 1981 || 372
|-----
| 1991 || 423
|-----
| 2001 || 591
|-----
| 2011 || 543
|-----
| 2021 || 468
|}
See also
- List of settlements in Elis