Absentee voting abroad
Voters who are not in Iceland on election day, may vote at any of Iceland's embassies or at the consulates in New York, Winnipeg, Faroe Islands and Nuuk.They may also vote by special arrangement with an Icelandic honorary consul. To cast a vote you need to make an appointment beforehand.
A a list of all the Icelandic embassies, consulates and honorary consuls can be found here