Detailed Map Of The Various Referendums To Join The EU

Map created by reddit user jkvatterholmThe map above shows where support was strongest for joining the EU by country, if a Referendums To Join The EU was held.

The map only goes up to 2013 and a few more have been held since then.

Here are the national results of the various ones:

Denmark (1972): 63.3% vs 36.7% to join
Ireland (1972): 83.1% vs 16.9% to join
UK (1975): 67.2% vs 32.8% to remain in (after they had already joined).
Åland (1994): 73.6% vs 26.4% to join
Austria (1994): 66.6% vs 33.4% to join
Finland (1994): 56.9% vs 43.1% to join
Norway (1994): 52.2% vs 47.8% against joining
Sweden (1994): 52.3% vs 47.7% to join. Also see: 1994 Swedish and Norwegian EU Referendum Results By Municipality
Switzerland (2001): 76.8% vs 23.2% against joining
Czech Republic (2003): 77.3% vs 22.7% to join
Estonia (2003): 66.8% vs 33.2% to join
Hungary (2003): 83.8% vs 16.2% to join
Latvia (2003): 67.5% vs 32.5% to join
Lithuania (2003): 91.1% vs 8.9% to join
Poland (2003): 77.6% vs 22.4% to join
Slovakia (2003): 93.7% vs 6.3% to join
Slovenia (2003): 89.6% vs 10.4% to join
Croatia (2012): 66.7% vs 33.3% to join
UK (2016): 51.9% vs 48.1% to leave

Other referendums not on the map:

Norway (1972): 53.5% vs 46.5% against joining
Greenland (1982): 53.0% vs 47.0% to leave EC, but remains one of the EU’s Overseas Countries and Territories
Switzerland (1997): 74.1% vs 25.9% against joining
Malta (2003): 53.6% vs 46.4% to join
San Marino (2013): 50.3% vs 49.7% to join, but the Quorum of 32% of registered voters in favour required for referendum to be valid not met.
North Macedonia (2018): 94.2% vs 5.8% to join, but turnout was around 37%, less than the 50% threshold required to validate the results.
Moldova (2024): 50.4% vs 49.6% to join but remains to be seen when they will.