| Arratzua-Ubarrundia | |
| Settlement Type: | Municipality |
| Image Alt: | A small village sitting in the shore of a reservoir |
| Pushpin Map: | Spain Basque Country |
| Pushpin Map Caption: | Location of Arratzua-Ubarrundia within the Basque Country |
| 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: | Gorbeialdea |
| Coordinates: | 42.8903°N -2.6392°W |
| Elevation M: | 541 |
| Area Total Km2: | 57.41 |
| Population Density Km2: | auto |
| Blank Name Sec1: | Official language(s) |
| Blank Info Sec1: | Basque Spanish |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 01510, 01520 |
| Leader Title: | Mayor |
| Leader Name: | Blanca Antépara Uribe |
| Leader Party: | EAJ/PNV |
Arratzua-Ubarrundia (in Basque pronounced as /arats̻u.a uβarundi.a/, Spanish; Castilian: Arrazua-Ubarrundia pronounced as /es/)[1] is a municipality located in the province of Álava, in the Basque Country, northern Spain. Its capital is the village of Durana.[2]
Arratzua-Ubarrundia is divided into 11 villages, of which 10 are organized as concejos.
| Official name | Basque name | Spanish name | Population (2021)[3] | Area (km2) | Notes | |
|---|---|---|---|---|---|---|
| Arroiabe | Arroiabe | Arróyabe | 91 | 4.70 | Concejo | |
| Arzubiaga | Arzubiaga | Arzubiaga | 20 | 2.58 | Concejo | |
| Betolaza | Betolatza | Betolaza | 27 | 4.28 | Concejo | |
| Durana | Dura | Durana | 363 | 3.92 | Concejo, capital of the municipality | |
| Landa | Landa | Landa | 39 | 7.60 | Concejo | |
| Luko | Luku | Luco | 60 | 4.57 | Concejo | |
| Mendibil | Mendibil | Mendívil | 40 | 3.18 | Concejo | |
| Nanclares de Gamboa/Langara Ganboa | Nanclares de Gamboa | Langara Ganboa | 20 | – | ||
| Ullíbarri-Gamboa | Ullíbarri-Gamboa | Uribarri Ganboa | 81 | 7.19 | Concejo | |
| Ziriano | Zirao | Ciriano | 7 | 3.23 | Concejo | |
| Zurbano/Zurbao | Zurbao | Zurbano | 269 | 4.75 | Concejo |