Greenough was an electoral district of the Legislative Assembly in the Australian state of Western Australia from 1890 to 2008.
The district was based in the northern part of Western Australia's Wheatbelt region.
At its abolition, it included the towns of Kalbarri, Northampton, Mullewa, Morawa, Dongara and Three Springs.
Greenough was abolished ahead of the 2008 state election, as a result of the reduction in rural seats made necessary by the one vote one value reforms.
Following Greenough's abolition, the sitting National MP, Grant Woodhams, contested the seat of Moore.