| Official Name: | Kortezubi |
| Pushpin Map: | Spain Basque Country |
| Pushpin Map Caption: | Location of Kortezubi within the Basque Country |
| Coordinates: | 43.3408°N -2.655°W |
| Subdivision Type: | Country |
| Subdivision Name: | Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Name1: | Basque Country |
| Subdivision Type2: | Province |
| Subdivision Name2: | Biscay |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Busturialdea |
| Leader Title: | Mayor |
| Leader Name: | Domingo Bilbao Etxebarria |
| Area Total Km2: | 12 |
| Elevation M: | 13 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 48315 |
| Website: | www.kortezubi.eus |
Kortezubi is a town and municipality located in the province of Biscay, in the Basque Autonomous Community, northern Spain. It has 444 inhabitants.