Sigrún Magnúsdóttir (born 15 June 1944) is an Icelandic politician and a former cabinet member.
The post had previously been held by Sigurður Ingi Jóhannsson (who combined it with Fisheries and Agriculture).
It was reassigned in the third reshuffle of the Cabinet of Sigmundur Davíð Gunnlaugsson.
Following the 2016 Icelandic parliamentary election (in which she did not stand) a new government was formed.
In January 2017 she was succeeded as environment minister by Björt Ólafsdóttir in the Cabinet of Bjarni Benediktsson.