Ancre
Native name	Inke (Picard)
Location
Country	France
Physical characteristics
Source
• location	Miraumont
Mouth
• location	Somme
• coordinates	49°54′24″N 2°28′33″E / 49.90667°N 2.47583°E / 49.90667; 2.47583
Length	37 km (23 mi)
Basin size	327 km2 (126 sq mi)
Discharge
• average	2.1 m3/s (74 cu ft/s)
Basin features
Progression	Somme→ English Channel

The Ancre (French pronunciation: [ɑ̃kʁ] ^ⓘ; Picard: Inke) is a river of Picardy, France. Rising at Miraumont, a hamlet near the town of Albert, it flows into the Somme at Corbie. It is 37.4 km (23.2 mi) long.^[1] For most of its length it flows through the department of Somme. For a short stretch near Puisieux, it forms the border with Pas-de-Calais.

• Battle of the Ancre Heights (October 1916)
• Battle of the Ancre (November 1916)