Prime Minister Kristrún Frostadóttir's centre-left government promised a referendum by 2027 but brought it forward amid international tensions, including US President Donald Trump's threats against Greenland. However, the campaign in this island nation of almost 400,000 people has centred more on the fishing industry than security concerns.
Iceland is already part of the EU's single market and the Schengen border-free zone, but membership would bring the country into the customs union and eventually the euro. The country began its application to join the EU in 2009 following the 2008 financial crisis and the collapse of its banking system. That application was well advanced when a eurosceptic government came to power in 2013 and put talks on hold, with fishing rights being the biggest obstacle then as now.
Fish and marine industries account for almost 40% of Iceland's exports, and many No voters feared losing control of lucrative fishing grounds under the EU's common fisheries policy. The referendum campaign fuelled debate about Iceland's place in the world, Frostadóttir said after casting her ballot in Reykjavik on Saturday. "This is a great day, we've been waiting for this for years to be able to have a vote," she said, adding that her government would continue its work regardless of the outcome.
The ballot question asked: "Should Iceland resume accession negotiations with the European Union?"