Grýtubakkahreppur (Icelandic pronunciation: [ˈkriːtʏˌpahkaˌr̥ɛhpʏr̥] , regionally also [ˈkriːtʰʏ-]) is a municipality located in northern-central Iceland, in Northeastern Region.

The population is approximately 400. It has a local convenience store, a bank, a preschool and a grade school.

Located on the eastern side of Eyjafjörður, north of Akureyri, next to Dalvík and not too far from Húsavík. Its main settlement is the village Grenivík [ˈkrɛːnɪˌviːk], which is located next to Kaldbakur mountain.

Local football club Magni Grenivík plays in the third tier of the Iceland football pyramid and play their home games at the Grenivíkurvöllur.

• Official website (in Icelandic)