Ísafjarðardjúp (Icelandic pronunciation: [ˈiːsaˌfjarðarˌtjuːp] ) is a large fjord in the Westfjords region of Iceland. Its name translates to Depth of the fjord of sea ice. Originally named simply Ísafjörður, the semantic run around happened through the -Deep meaning the inner parts of the fjord being reapplied throughout the innsea. It has even been suggested that this is nonsensical and should be reversed. The fjord was named simultaneously with the island by Raven-Floke as he viewed it from a mountain from the south.
Ísafjörður, capital of the Westfjords region, is situated close to the mouth of Ísafjarðardjúp in Skutulsfjörður. Other major settlements in Ísafjarðardjúp are Bolungarvík, Hnífsdalur and Súðavík.
