| Oyón-Oion | |
| Native Name: | Oion |
| Native Name Lang: | baq |
| Other Name: | Oyón |
| Settlement Type: | Town and Municipality |
| Mapsize: | 250px |
| Pushpin Map: | Spain Basque Country#Spain |
| Pushpin Map Caption: | Location of Oyón-Oion within the Basque Country##Location of Oyón-Oion within Spain |
| Coordinates: | 42.5058°N -2.4364°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Autonomous Community |
| Subdivision Type2: | Province |
| Subdivision Name2: | Álava |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Rioja Alavesa |
| Leader Title: | Mayor |
| Leader Name: | José Manuel Villanueva Gutiérrez |
| Elevation M: | 440 |
| Elevation Ft: | 1444 |
| Elevation Max Footnotes: | [1] |
| Elevation Max M: | 964 |
| Elevation Min M: | 370 |
| Area Total Km2: | 46 |
| Area Urban Km2: | 1 |
| Area Rural Km2: | 45 |
| Population Density Km2: | auto |
| Population Density Sq Mi: | 177.8 |
| Utc Offset1: | +1.00 |
| Postal Code Type: | Post Code |
| Postal Code: | 01320 |
| Twin1: | Saint-Martin-de-Seignanx |
| Twin1 Country: | France |
Oyón in Spanish or Oion in Basque is a town and municipality located in the province of Álava, in the Basque Country, northern Spain. The town was formed by the incorporation of the towns Barriobusto and Labraza.
Oyón is a sister city of the French town Saint-Martin-de-Seignanx.