A non-binding referendum on the Single European Act was held in Denmark on 27 February 1986.

[3] The referendum was held by the government of the Prime Minister of Denmark, Poul Schlüter.

The government was in favour of Denmark ratifying the Single European Act, but a majority in parliament voted against it.

[4][2] The referendum was the last Europe-related referendum in which parties such as the Social Democrats and the Social Liberal Party were against ratification.

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