June 1866 Danish Folketing election
{{Politics of Denmark}}
Folketing elections were held in Denmark on 4 June 1866.Dieter Nohlen & Philip Stöver (2010) Elections in Europe: A data handbook, p523 {{ISBN|978-3-8329-5609-7}} The National Left emerged as the largest faction, winning 30 of the 101 seats.Skov, Kaare R (1999) Demokratiets Danmarkshistorie – Gennem 150 år, København: Aschenhoug Christian Emil Krag-Juel-Vind-Frijs remained Prime Minister.
Electoral system
The elections were held using first-past-the-post voting in single-member constituencies.Nohlen & Stöver, p510 Only 15% of the population was eligible to vote in the elections,Nohlen & Stöver, p526 with suffrage restricted to men over 30 who were not receiving poor relief (or who had not paid back any previous poor relief received), were not classed as "dependents" (those who were privately employed but did not have a household) and who had lived in their constituency for a certain length of time.Nohlen & Stöver, p511
Results
{{Election results
|party1=National Left|votes1=|seats1=30|sc1=New
|party2=National Liberal Party|votes2=|seats2=20|sc2=–20
|party3=A.F. Tscherning Left|votes3=|seats3=15|sc3=New|color3=#003DC8
|party4=People's Left|votes4=|seats4=13|sc4=New
|party5=Højre|votes5=|seats5=13|sc5=+2
|party6=Mellem Party|votes6=|seats6=10|sc6=New
|total_sc=0
|electorate=250616|turnout=41.1
|source=Skov, Nohlen & Stöver
}}