The First cabinet of Katrín Jakobsdóttir was formed on 30 November 2017, following the 2017 parliamentary election.

The cabinet was led by Katrín Jakobsdóttir of the Left-Green Movement, who served as Prime Minister of Iceland.

The cabinet was a coalition government consisting the Independence Party, the Left-Green Movement and the Progressive Party.

[1] Together they held 33 of the 63 seats in the Parliament of Iceland (i.e. Althing; Icelandic: Alþingi) and served as a majority government.

[2] After the election in 2017 the parties had 35 seats in the parliament, but since then two MPs have left the Left-Green Movement.