| Mulligan River | |
| Subdivision Type1: | State |
| Subdivision Name1: | Queensland |
| Subdivision Type2: | Region |
| Subdivision Name2: | Channel Country |
| Length: | 340 km |
| Source1 Location: | Glenormiston Station |
| Source1 Elevation: | 205 m[1] |
| Mouth: | Eyre Creek |
| Mouth Elevation: | 49 m[2] |
| River System: | Lake Eyre Basin |
| Tributaries Left: | Ripunthala Creek |
| Tributaries Right: | Mulligan Creek, Sandy Creek, Kalabarkaloo Creek |
The Mulligan River is a tributary of Eyre Creek in the Channel Country region of southwest Queensland. It is in the Lake Eyre Basin.[3] The river rises in Glenormiston Station and flows generally south through Marion Downs Station into Eyre Creek, which ultimately feeds through the Warburton River into Lake Eyre.