Seiland (Norwegian) Archeological excavations have shown that people have lived on Seiland for over 7000 years.

Today, however, the only people on it live in a few relatively isolated areas such as from Altneset to Hakkstabben on the southern tip of the island; Kårhamn on the northwestern side; and the Hønseby, Eidvågen, Fiskebukta, Survika areas in the northern part of the island.

There are two glaciers on Seiland: Seilandsjøkelen and Nordmannsjøkelen.

The 1,078-metre (3,537 ft) tall Seilandstuva is the tallest mountain on the island.

A number of fjords are located on the island including Lille Kufjorden, Store Kufjorden, Nordefjorden, and Jøfjorden.