Mount Druitt is an electoral district of the Legislative Assembly in the Australian state of New South Wales.

It is represented by Edmond Atalla of the Labor Party.

It is a 38.95 km2 urban electorate in Sydney's outer west.

Mount Druitt was originally created in 1971 and abolished prior to the 1981 election and replaced by St Marys.

On its current boundaries, Mount Druitt takes in the suburbs of Mount Druitt, Bidwill, Blackett, Dean Park, Dharruk, Glendenning, Hassall Grove, Hebersham, Minchinbury, Oakhurst, Plumpton, Rooty Hill, Shalvey and parts of Colebee, Eastern Creek, Emerton and Lethbridge Park.