| Loir | |
| Map: | Loir (rivière).png |
| Nickname: | Loir sans E ("Loir-without-E")[1] [2] |
| Name Etymology: | From Gaulish ledo, "flow"[3] |
| Mouth Coordinates: | 47.5575°N -0.5264°W |
| Subdivision Type1: | Country |
| Length: | 319km (198miles) |
| Source1 Elevation: | 150m (490feet) |
| Discharge1 Avg: | 33m3/s |
| Basin Size: | 8270km2 |
The Loir (in French pronounced as /lwaʁ/) is a 319km (198miles) long river in western France. It is a left tributary of the Sarthe. Its source is in the Eure-et-Loir department, north of Illiers-Combray. It joins the river Sarthe in Briollay, north of the city of Angers.
It is indirectly a tributary of the Loire, and runs roughly parallel to it and slightly north of it for much of its length, and so might be regarded as a Yazoo type river.