Ource

Ource
The Ource at Autricourt.
Country	France
Basin features
Main source	Near Poinson-lès-Grancey 400 m (1,300 ft) 47°41′24″N 04°58′41″E / 47.69000°N 4.97806°E / 47.69000; 4.97806
River mouth	Seine 156 m (512 ft) 48°05′46″N 04°22′51″E / 48.09611°N 4.38083°E / 48.09611; 4.38083Coordinates: 48°05′46″N 04°22′51″E / 48.09611°N 4.38083°E / 48.09611; 4.38083
Progression	Seine→ English Channel
Basin size	736 km2 (284 sq mi)
Physical characteristics
Length	100 km (62 mi)
Discharge	Average rate: 8.6 m3/s (300 cu ft/s)

The Ource (French: [uʁs]) is a 100 km (62 mi) long river in northeastern France, right tributary of the river Seine. Its source is in the Haute-Marne département, 2 km south of Poinson-lès-Grancey. It flows generally northwest. It joins the Seine at Bar-sur-Seine.

Its course crosses the following départements and communes: