Fjerritslev is a town in North Jutland, Denmark. It is located in Jammerbugt Municipality, 13 km north of Løgstør, 37 km northeast of Thisted and 30 km southwest of Aabybro.

The North Jutlandic Island, Vendsyssel-Thy, or Jutland north of the Limfjord is the northernmost part of Denmark and of Jutland. It is more common to refer to the three traditional districts of Vendsyssel, Hanherred, and Thy. The area has been intermittently a tied island and, during modern times, was not surrounded by water until a storm in February 1825, which severed the region from the remainder of Jutland and caused a water connection between the North Sea and the western end of the Limfjord. Hence, it is traditionally regarded as a part of Jutland rather than a separate island.