Kristin Halvorsen (born 2 September 1960) is a Norwegian socialist politician.
She served as Minister of Finance from 17 October 2005 to 20 October 2009 and as Minister of Education from 20 October 2009 to 16 October 2013.
Taking over as leader of the Socialist Left Party in 1997, she established an unprecedented level of consensus within the party.
At the 2005 election, the party received a disappointing 8.8% share of the vote, and in 2009 down further, to 6.2%.
Many who describe themselves as being on the left side of the party have suggested that Halvorsen step down.
She was succeeded by Audun Lysbakken on 11 March 2012.
The Socialist Left, in coalition with the Labour Party and the Centre Party, won Norway's September 2005 parliamentary elections.
The resulting Red-Green coalition government marked the first time that the Socialist Left Party was included in the cabinet.
Kristin Halvorsen took office as the 125th Minister of Finance in Norwegian history and the first woman ever to serve in that post.
She resigned as leader of the Socialist Left Party in 2012.