The Danish Landsting election of 1943 was held on 6 April 1943, with the exception that the electors were elected on 23 March. Along with the corresponding Folketing election, it was the first election during the German occupation, and although many people feared how the Germans might react to the election, the event took place peacefully.
The voter turnout was at 88.8% unusually high, and along with the Folketing election of the same year the election became a demonstration against the occupation. After the elections, leading German newspapers expressed disappointment and indignation with the lack of political evolution among the Danish voters.
Of the seven constituencies the seats elected by the resigning parliament and the seats representing constituencies number two (Copenhagen County, Frederiksborg County, Holbæk County, Sorø County, Præstø County and Maribo County), number three (Bornholm County) and number five (Vejle County, Aarhus County, Skanderborg County, Ringkøbing County, Ribe County, Aabenraa County, Haderslev County, Sønderborg County and Tønder County). Constituency number seven, which represented the Faroe Islands, had previously held elections simultaneously with these three constituencies but the election on the Faroe Islands was postponed for four years until the 1947 election.