Haganeshreppur was a hreppur,[1] an old Icelandic municipality, in Fljót, in the northernmost part of Skagafjörður County, Iceland.

[2] The hreppur united with Holtshreppur in 1898 (or 1899) when Fljótahreppur was divided in two.

The two hreppurs reunited under the old name on April 1, 1988.

[3] On June 6, 1998, Fljótahreppur joined with 10 other local governments to form Skagafjörður County.

[4] The last Haganeshreppur council election was held in 1986.