The district of Parwan is situated on the volcanic plains to the west of Melbourne in Victoria, Australia. The area is close to the township of Bacchus Marsh and is bounded to the north by the impressive Parwan Volcanic Gorge where the Werribee river cuts through the ancient lava flows as it leaves the Bacchus Marsh flood plains.

Parwan has regional biodiversity significance and makes a substantial contribution to biodiversity in the Victorian Volcanic Plains Bioregion. A diverse range of ecological vegetation classes are found here with the bioregional conservation status of Endangered, or in the case of the grasslands, Critically Endangered.

The Parwan Gorge escarpment is uniquely significant being dominated by moonah (Melaleuca lanceolata) and the area is an important wildlife corridor with links to Djerriwarrh Creek and Long Forest in the north, and the Pinkerton and Eynesbury forests in the south.

Local landholders and community members have come together to form The Parwan Landcare Group to work together to improve the environment, land management and biodiversity of Parwan.