| Azilu | |
| Settlement Type: | Concejo |
| Pushpin Map: | Spain Álava#Spain Basque Country#Spain |
| Pushpin Label Position: | left |
| Subdivision Type: | Country |
| Subdivision Name: | Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Name1: | Basque Country |
| Subdivision Type2: | Province |
| Subdivision Name2: | Álava |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Llanada Alavesa |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Iruraiz-Gauna |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.27 |
| Population As Of: | 2023 |
| Population Footnotes: | [2] |
| Population Total: | 29 |
| Population Density Km2: | auto |
| Elevation M: | 638 |
| Postal Code Type: | Postal code |
| Postal Code: | 01193 |
Azilu (Spanish; Castilian: Acilu) is a hamlet and concejo in the municipality of Iruraiz-Gauna, in Álava province, Basque Country, Spain. It is the capital of the municipality.[3]