Kollóttadyngja (Icelandic pronunciation: [ˈkʰɔtlˌouhtaˌtiɲca] ) is a shield volcano in the Ódáðahraun lava-field in Iceland. Its height reaches 1,177 metres, and it has a diameter of 6–7 km. The summit crater is 800 metres in diameter, but only about 20–30 metres deep. In its centre, there is a bowl about 150 metres in diameter with a depth of about 60–70 metres.

The mountain is located in the Nordhurland Eystra (Northeastern Region) of Iceland and is one of the 236 named mountains at Vatnajökull National Park.

See also

• Fjords of Iceland
• Geography of Iceland
• Glaciers of Iceland
• Iceland plume
• List of lakes of Iceland
• List of islands off Iceland
• List of rivers of Iceland
• Waterfalls of Iceland
• Volcanism of Iceland
  • List of volcanic eruptions in Iceland
  • List of volcanoes in Iceland