[2] The merger was finalized in the municipality elections in March 2022.

Húnabyggð is among the largest municipalities of Iceland in terms of area and reaches from Húnaflói (Húna Bay), on which Blönduós is situated, to the interior, in which Langjökull and Hofsjökull are situated.

Blönduvirkjun hydropower plant is situated in the municipality.

In June 2024, 90% of Húnabyggð voters and 75% of Skagabyggð voters approved a merger wherein the two municipalities would combine into a larger municipality, also known as Húnabyggð.

[3] This effectively extended Húnabyggð's area farther northward along Húnaflói.