The Milgate Park Estate is a housing estate in Doncaster East, a suburb of Melbourne, Australia. The estate comprises 40 hectares of land situated around a section of Long Valley, a gully bed that no longer carries surface water, which flows northeast and into the Mullum Mullum Creek. The land was used for orchards from the 1860s to the 1970s when it was subdivided for residential housing. Land in the estate itself was released to the public in two stages, the southern area first, followed by the northern area.