Final result:
Guðni Th. Jóhannesson 71,356 (39.1)
Halla Tómasdóttir 50,995 (27.9)
Andri Snær Magnason 26,037 (14.3)
Davíð Oddsson 25,108 (13.7)
Sturla Jónsson 6,446 (3.5)
Below 1,500
Elísabet Jökulsdóttir 1,280 (0.7)
Ástþór Magnússon 615 (0.3)
Guðrún Margrét Pálsdóttir 477 (0.3)
Hildur Þórðardóttir 294 (0.2)
The worst result for any candidate had previously been Hannes Bjarnason geting 0.98% in 2012, so no less than four candidates managed to break this "record". Hannes got 1,556 votes so this is the first time any candidate has gotten fewer votes than the 1,500 signatures required to run.
Reykjavík North:
Guðni Th. Jóhannesson: 36.0
Andri Snær Magnason: 23.8 Halla Tómasdóttir: 22.0
Davíð Oddsson: 12.9
Sturla Jónsson: 3.4
Elísabet Jökulsdóttir: 1.2 Ástþór Magnússon: 0.3
Guðrún Margrét Pálsdóttir: 0.3
Hildur Þórðardóttir: 0.2
Reykjavík South:
Guðni Th. Jóhannesson: 38.5
Halla Tómasdóttir: 23.5
Andri Snær Magnason: 19.1
Davíð Oddsson: 13.6
Sturla Jónsson: 3.7
Elísabet Jökulsdóttir: 0.9
Ástþór Magnússon: 0.3
Guðrún Margrét Pálsdóttir: 0.3
Hildur Þórðardóttir: 0.2
South-West:
Guðni Th. Jóhannesson: 39.9
Halla Tómasdóttir: 28.9
Davíð Oddsson: 13.9
Andri Snær Magnason: 12.9
Sturla Jónsson: 3.7
Elísabet Jökulsdóttir: 0.5
Ástþór Magnússon: 0.3
Guðrún Margrét Pálsdóttir: 0.2
Hildur Þórðardóttir: 0.1
South:
Guðni Th. Jóhannesson: 35.2
Halla Tómasdóttir: 34.2Davíð Oddsson: 16.7 Andri Snær Magnason: 7.3
Sturla Jónsson: 5.1 Elísabet Jökulsdóttir: 0.7
Ástþór Magnússon: 0.4
Guðrún Margrét Pálsdóttir: 0.3
Hildur Þórðardóttir: 0.2
North-West:
Guðni Th. Jóhannesson: 42.1
Halla Tómasdóttir: 32.0
Davíð Oddsson: 14.1
Andri Snær Magnason: 7.2
Sturla Jónsson: 3.2
Elísabet Jökulsdóttir: 0.5
Ástþór Magnússon: 0.5 Guðrún Margrét Pálsdóttir: 0.3
Hildur Þórðardóttir: 0.2
North-East:
Guðni Th. Jóhannesson: 45.1 Halla Tómasdóttir: 31.1
Davíð Oddsson: 11.2
Andri Snær Magnason: 8.9
Sturla Jónsson: 2.5
Elísabet Jökulsdóttir: 0.4
Ástþór Magnússon: 0.3
Guðrún Margrét Pálsdóttir: 0.2
Hildur Þórðardóttir: 0.1