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. 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)