Ashburton was an electoral district of the Legislative Assembly in the Australian state of Western Australia from 1890 to 1901 and again from 1989 to 1996.

The district was one of the original 30 seats contested at the 1890 election. It was located in the remote north-west of the state. In 1898, the district's main settlement was the town of Onslow; it also included various pastoral leases along the Fortescue River.^[1] The seat was abolished ahead of the 1901 election.

Revived for the 1989 election, Ashburton was won by Labor candidate Pam Buchanan, previously the member for Pilbara. Buchanan, by this time an independent, resigned the seat in 1991 due to ill-health, triggering a by-election won by Labor candidate Fred Riebeling. The district was abolished ahead of the 1996 election and Riebeling shifted to the new seat of Burrup at that election.