| Ancre | |
| Map: | Ancre (rivière).png |
| Mouth Coordinates: | 49.9067°N 2.4758°W |
| Subdivision Type1: | Country |
| Length: | 37km (23miles) |
| Discharge1 Avg: | 2.1m3/s |
| Basin Size: | 327km2 |
The Ancre (in French pronounced as /ɑ̃kʁ/;) 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 37.4km (23.2miles) 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.