Þorskafjörður is a roughly sixteen-kilometre-long fjord in the Icelandic county of Austur-Barðastrandarsýsla.
Like other fjords in its area, Þorskafjörður is shallow; its innermost shore is formed of clay.
Two short and shallow fjords branch off Þorskafjörður: Djúpifjörður and Gufufjörður.
From the bottom of Þorskafjörður, Þjóðvegur 60 runs through Þorskafjarðarheiði across to Ísafjarðardjúp.
The poet Matthías Jochumsson was born on the farm Skógar in Þorskafjörður in 1835.