Hörgársveit is a municipality located in north-central Iceland, in Northeastern Region. Its seat is the village of Lónsbakki. The former municipality of Hörgárbyggð was formed on 1 January 2001 by the union of the municipalities of Skriða (Skriðuhreppur), Öxnadalur (Öxnadalshreppur) and Glæsibær (Glæsibæjarhreppur). In 2010 Hörgárbyggð merged with the municipality of Arnarnes (Arnarneshreppur) to form the current municipality of Hörgársveit.
Located on the Eyjafjörður, to the north of Akureyri, Hörgársveit is made up of several villages, principally Þelamörk, Lónsbakki (115 inhabitants) and Hjalteyri (37 inhabitants), the seat of the former municipality of Arnarnes.