| Mahury | |
| Pushpin Map: | French Guiana |
| Pushpin Map Caption: | Location of mouth |
| Subdivision Type1: | Country |
| Subdivision Type2: | Region |
The Mahury is an extended estuary of French Guiana southeast of Cayenne. It reaches inland from the Atlantic Ocean,[1] where it becomes known as the Oyak. Including its source rivers Comté and Oyak, it is 169km (105miles) long.