| Ásta Ragnheiður Jóhannesdóttir | |
| Order: | Minister of Social Affairs and Social Security |
| Primeminister: | Jóhanna Sigurðardóttir |
| Term Start: | 1 February 2009 |
| Term End: | 10 May 2009 |
| Predecessor: | Jóhanna Sigurðardóttir |
| Successor: | Árni Páll Árnason |
| Birth Date: | 16 October 1949 |
| Birth Place: | Reykjavík, Iceland |
| Spouse: | Einar Örn Stefánsson |
| Children: | A daughter (b. 1972) and a son (b. 1976) |
| Alma Mater: | University of Iceland |
| Party: | Social Democratic Alliance |
Ásta Ragnheiður Jóhannesdóttir (in Icelandic ˈausta ˈrakn̥heiðʏr ˈjouːhanɛsˌtouʰtɪr̥/; born 16 October 1949) is an Icelandic politician and was 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]