Dalvíkurbyggð is a small municipality in northern Iceland. Dalvíkurbyggð is on Tröllaskagi and west of Eyjafjörður.
The municipality of Dalvíkurbyggð was formed in 1998 by the merger of three districts of outer Eyjafjörður: the town of Dalvík and the rural districts of Svarfaðardalur and Árskógur. The logo of Dalvíkurbyggð shows three mountains, signifying the joining of the three communities.