| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Crooked River (Machias River tributary) | Machias River | 18,800 | 44.9308000000 | -67.8523000000 | Map | ||||||
| East Machias River | Machias River | 58,000 | 44.7150000000 | -67.3850000000 | Map | ||||||
| Middle River (Maine) | Machias River | 9,200 | 44.7210000000 | -67.4500000000 | Map | ||||||
| West Branch Machias River | Machias River | 16,000 | 44.9577000000 | -67.8725000000 | Map |