Electoral district of Armadale

Armadale Western Australia—Legislative Assembly
Location of Armadale (dark green) in the Perth metropolitan area
State	Western Australia
Dates current	1983–present
MP	Tony Buti
Party	Labor
Namesake	Armadale
Electors	28,323 (2017)
Area	47 km2 (18.1 sq mi)
Demographic	East Metropolitan

Armadale is a Legislative Assembly electorate in the state of Western Australia. The district is named for the southeastern Perth suburb of Armadale which falls within its borders.

Armadale was created at the 1982 redistribution out of parts of the seats of Dale and Gosnells. It was first contested in the 1983 election at which Labor member Bob Pearce, who had previously represented Gosnells, was successful. The seat has been regarded as very safe for the Labor Party since its creation, and at the 2001 election, the Liberal Party did not even field a candidate for the seat. It was held from 1996 until 2010 by Alannah MacTiernan, the Minister for Planning and Infrastructure in the Gallop and Carpenter governments.

On 25 June 2010, Alannah MacTiernan resigned from the Western Australian Legislative Assembly to run for the federal seat of Canning. A by-election occurred on 2 October 2010 and Labor candidate Tony Buti was elected. Buti was re-elected at the state elections in 2013 and 2017. In the latter election, he increased his majority to 25.2 percent, making Armadale the safest seat in the legislature.