| Mullum Mullum Creek | |
|---|---|
 The Mullum Mullum Creek at Mitcham | |
| Location | |
| Country | Australia |
| State | Victoria |
| LGA | City of Maroondah City of Manningham |
| City | Melbourne |
| Physical characteristics | |
| Mouth | confluence with the Yarra River |
• location | Templestowe |
• coordinates | 37°44′17″S 145°9′45″E / 37.73806°S 145.16250°E |
• elevation | 27 m (89 ft) |
| Length | 22 km (14 mi) |
| Discharge | |
| • location | mouth |
| Basin features | |
| River system | Port Phillip catchment |
Mullum Mullum Creek is a creek in the outer eastern suburbs of Melbourne, Victoria, Australia. It is the main watercourse of the Mullum Mullum Valley, a tributary of the Yarra River and Yarra Valley. For tens of thousands of years it was used as a food and tool source sustainably by the Wurundjeri people, Indigenous Australians of the Kulin nation, who spoke variations of the Woiwurrung language group.
It is one of the only watercourses lying within urban metropolitan Melbourne that is surrounded by native and regenerated bushland for almost its entire length, and is a significant remnant ecosystem in Melbourne. Around 80,000 people live in the creek's catchment area. The remnant bushland across its length provides habitat for significant species such as platypus, rakali, koalas, powerful owl, nankeen night heron, white-winged chough and yellow-tailed black cockatoo.
In recent decades the creek and valley have been central in many of the issues in Melbourne's eastern suburbs, such as; residential housing estates, regeneration of native vegetation and most recently, Tollway construction. The Eastlink Tollway passes underneath the valley through 1.5-km of tunnels to avoid disturbing the remnant ecosystem through the Mullum Mullum Gorge, however through Ringwood, it crosses the creek above ground, resulting in the relocation of the creek through this area.