| Adour | |
| Map: | Adour river watershed.jpg |
| Map Size: | 250 |
| Source1 Location: | High-Bigorre |
| Mouth Location: | Atlantic Ocean |
| Mouth Coordinates: | 43.5294°N -1.5236°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | France |
| Length: | 308km (191miles) |
| Source1 Elevation: | 2200m (7,200feet) |
| Discharge1 Avg: | 150m3/s |
| Basin Size: | 16880km2 |
The Adour (in French pronounced as /aduʁ/; Basque: Aturri; Occitan (post 1500);: Ador) is a river in southwestern France. It rises in High-Bigorre (Pyrenees), in the commune of Aspin-Aure, and flows into the Atlantic Ocean (Bay of Biscay) near Bayonne. It is long, of which the uppermost ca. is known as the Adour de Payolle. At its final stretch, i.e. on its way through Bayonne and a short extent upstream, the river draws the border between the Northern Basque Country and Landes regions.
Départements and towns along the river include:
The main tributaries of the Adour are, from source to mouth: