| Bocholter Aa | |
| Mouth Coordinates: | 51.8846°N 6.3881°W |
| Subdivision Type1: | Countries |
| Length: | 55.7km (34.6miles) |
| Basin Size: | 536km2 |
Bocholter Aa is a river of North Rhine-Westphalia, Germany, and the Achterhoek of the Netherlands. It flows through the town Bocholt. Its last part, before joining the Oude IJssel in Ulft, is called Aa-strang in Dutch.