| Official Name: | Elduain |
| Pushpin Map: | Spain Basque Country |
| Pushpin Map Caption: | Location of Elduain within the Basque Country |
| Coordinates: | 43.1406°N -2.0008°W |
| Subdivision Type: | Country |
| Subdivision Name: | Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Name1: | Gipuzkoa |
| Subdivision Type2: | Province |
| Area Total Km2: | 25.07 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Website: | www.elduain.eus |
Elduain is a village in the province of Gipuzkoa, in the autonomous community of the Basque Country, northern Spain. It is situated in the Leitzaran valley, some 32 km south of San Sebastián. The municipality has a population of 239 (2014) and covers an area of 25 km². It was founded in 1614.