| Mirrool | |
| Name Other: | Merool |
| Name Etymology: | Aboriginal |
| Map Size: | 250 |
| Pushpin Map: | Australia New South Wales |
| Pushpin Map Size: | 250 |
| Pushpin Map Caption: | Location of Mirrool Creek mouth in New South Wales |
| Subdivision Type1: | Country |
| Subdivision Name1: | Australia |
| Subdivision Type2: | State |
| Subdivision Name2: | New South Wales |
| Subdivision Type3: | Region |
| Subdivision Name3: | Riverina (IBRA) |
| Subdivision Type4: | LGAs |
| Subdivision Name4: | Bland, Griffith, Carrathool, Hay |
| Subdivision Type5: | Town |
| Subdivision Name5: | ,, |
| Length: | 264km (164miles) |
| Source1: | Great Dividing Range |
| Source1 Location: | west by south of |
| Source1 Coordinates: | -34.4656°N 147.3992°W |
| Source1 Elevation: | 304m (997feet) |
| Mouth: | Lachlan River |
| Mouth Location: | northwest of |
| Mouth Coordinates: | -34.4°N 197°W |
| Mouth Elevation: | 84m (276feet) |
| River System: | Murrumbidgee catchment, Murray–Darling basin |
| Tributaries Left: | Yarranjerry Creek, Little Mirrool Creek |
| Tributaries Right: | Mandamah Creek, Kildary Creek, Bolaro Creek, Wah Wah No 9 Channel |
| Custom Label: | Waterfall |
| Extra: | [1] [2] [3] [4] |
Mirrool Creek, a watercourse that is part of the Lachlan sub-catchment of the Murrumbidgee catchment in the Murray–Darling basin, is in the Riverina region of New South Wales, Australia. The course of the Mirrool Creek is indefinite at various locations.
Mirrool Creek (technically a river) rises in the Ingalba Nature Reserve, about west by south of the town of, sourced by runoff from the Great Dividing Range. The creek flows generally north northwest, west, north by west, and west again for approximately, joined by four minor tributaries, before becoming indefinite approximately south southwest of . The Mirrool Creek rises again approximately east of and flows for approximately west southwest, and to the south of,, and Griffith, before heading northwest by north and flowing into the Barren Box Swamp, where the creek does not drain above the land surface. The Mirrool Creek rises again southwest of the village of and flows west and then west southwest, joined by one minor tributary, before reaching its confluence with the Lachlan River, north northwest of the town of . The creek descends over the entire 264km (164miles) course.[1] [2] [3]
The creek is crossed by the Newell Highway at the locality of and at the town of ; the Kidman Way south of Hanwood and north of Darlington Point; the Mid-Western Highway northeast of Hay; and the Cobb Highway northwest of Hay.[1] [2]