Seyluhreppur is wide, but only six towns in the hreppur had land bordering the mountain.

[2] Agriculture was, for a long time, the inhabitants’ primary occupation, but shortly before 1950, a small urban area developed in Varmahlíð, most of whose residents work in various types of businesses or in service jobs.

Varmahlíð has a school, community center, hotel, and swimming pool, as well as shops and other services.

[citation needed] On June 6, 1988, the hreppur joined ten other local municipalities to form the eponymous municipality of Skagafjörður: Skefilsstaðahreppur, Sauðárkrókur, Skarðshreppur, Staðarhreppur, Lýtingsstaðahreppur, Rípurhreppur, Viðvíkurhreppur, Hólahreppur, Hofshreppur, and Fljótahreppur.

[4] The last government council in Seyluhreppur was elected in the May 28, 1994 municipal elections, consisting of Anna Sigríður Hróðmarsdóttir, Arnór Gunnarsson, Kristján Sigurpálsson, Sigurður Haraldsson, and Sveinn Allan Morthens.