Kristján Þór Júlíusson (15 July 1957 in Dalvík) is an Icelandic politician, a member of Alþingi and former Minister of Fisheries and Agriculture.

He is a certified steersman and captain and worked in that field for several years.

He is married to Guðbjörg Ringsted and they have four children; María, Júlíus, Gunnar and Þorsteinn.

In the 1998 municipal elections he ran for office in Akureyri and has since been credited for the increased support for the Independence Party in Akureyri at the expense of the Progressive Party, which had been the most powerful in Akureyri for decades.

In January 2007 he stepped down as mayor of Akureyri to run for a seat on Alþingi, which he won.