| Official Name: | Itsasondo |
| Pushpin Map: | Spain |
| Pushpin Map Caption: | Location in Spain |
| Coordinates: | 43.0678°N -2.1672°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Autonomous Community |
| Subdivision Type2: | Province |
| Subdivision Name2: | Gipuzkoa |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Goierri |
| Area Total Km2: | 8.94 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Website: | www.itsasondo.eus |
Itsasondo is a town and municipality located in the Goierri region of the province of Gipuzkoa, in the autonomous community of the Basque Country, northern Spain.