Nelson was an electoral district of the Legislative Assembly in the Australian state of Western Australia from 1890 to 1950.

The district was based in the south-western part of Western Australia, including towns such as Manjimup and Pemberton, and was named for the Nelson land district which formed its original boundaries.

In 1898, its major settlement was Bridgetown and it also included the Greenbushes tin fields.

Its last member, Ernest Hoar of the Labor Party, transferred to the new seat of Warren.

This Western Australian government-related article is a stub.