2013 Croatian constitutional referendum
A constitutional referendum was held in Croatia on 1 December 2013. The proposed amendment to the constitution would define marriage as being a union between a man and a woman, which would create a constitutional prohibition against same-sex marriage. 37.9% of eligible voters voted. After processing all of the ballots, the State Election Commission announced that 65.87% voted "yes", 33.51% "no" and 0.57% of ballots were disregarded as invalid.