| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| August River | Sepik | -4.1004000000 | 141.1506100000 | Map | |||||||
| Simaiya | Sepik | -3.9561500000 | 141.2771500000 | Map | |||||||
| Purari River |  | 33,670,000,640 | 1,240 | Golfo de Papua | 470,000 | -6.4000000000 | 144.2500000000 | Map | |||
| Sepik |  | 4 | 80,321,003,520 | 2,170 | Mar de bismarck | 1,126,000 | -3.8423300000 | 144.5388800000 | Map | ||
| Bae'e River |