Ásta Ragnheiður Jóhannesdóttir (Icelandic: [ˈausta ˈrakn̥heiðʏr ˈjouːhanɛsˌtouʰtɪr̥]; born 16 October 1949) is an Icelandic politician, lawmaker and a former Speaker of Alþingi, Iceland's parliament.

She was Iceland's Minister of Social Affairs and Social Security from 1 February 2009 – 14 May 2009.

She served as speaker of the Althing from 2009 to 2013.

[1] She has been a member of the Alþing since 1995.

[2] This biographical article about an Icelandic politician is a stub.