| Alpercatas River | |
|---|---|
| Native name | Rio Alpercatas |
| Country | Brazil |
| Basin features | |
| Main source | Maranhão state |
| River mouth | 6°01′47″S 44°18′42″W / 6.029736°S 44.311702°WCoordinates: 6°01′47″S 44°18′42″W / 6.029736°S 44.311702°W |
| River system | Itapecuru River |
The Alpercatas River is a river of Maranhão state in northeastern Brazil. It is a tributary of the Itapecuru River.
Some of the headwaters of the river are protected by the 437,000 hectares (1,080,000 acres) Mirador State Park, created in 1980.