Federal elections were held in Germany on 14 September 1930. Despite losing ten seats, the Social Democratic Party of Germany (SPD) remained the largest party in the Reichstag, winning 143 of the 577 seats, while the Nazi Party (NSDAP) dramatically increased its number of seats from 12 to 107. The Communists also increased their parliamentary representation, gaining 23 seats and becoming the third-largest party in the Reichstag.
Federal elections were held in Germany on 20 May 1928. The Social Democratic Party of Germany (SPD) remained the largest party in the Reichstag after winning 153 of the 491 seats. Voter turnout was 75.6%.
Federal elections were held in Germany on 19 January 1919, although members of the standing army in the east did not vote until 2 February. The elections were the first of the new Weimar Republic, which had been established after World War I and the Revolution of 1918–19, and the first with women's suffrage. The previous constituencies, which heavily overrepresented rural areas, were scrapped, and the elections held using a form of proportional representation. The voting age was also lowered from 25 to 20. Austrian citizens living in Germany were allowed to vote, with German citizens living in Austria being allowed to vote in the February 1919 Constitutional Assembly elections.
Federal elections were held in Germany on 16 June 1903. Despite the Social Democratic Party (SPD) receiving a clear plurality of votes, the Centre Party remained the largest party in the Reichstag after winning 100 of the 397 seats, whilst the SPD won only 81. Voter turnout was 76.1%.
Federal elections were held in Germany on 15 June 1893. Despite the Social Democratic Party (SPD) receiving a plurality of votes, the Centre Party remained the largest party in the Reichstag after winning 96 of the 397 seats, whilst the SPD won just 44. Voter turnout was 72.4%.
Federal elections were held in Germany on 12 January 1912. Although the Social Democratic Party (SPD) had received the most votes in every election since 1890, it had never won the most seats, and in the 1907 elections, it had won fewer than half the seats won by the Centre Party despite receiving over a million more votes. However, the 1912 elections saw the SPD retain its position as the most voted-for party and become the largest party in the Reichstag, winning 110 of the 397 seats.
Federal elections were held in Germany on 25 January 1907. Despite the Social Democratic Party (SPD) receiving a clear plurality of votes, they were hampered by the unequal constituency sizes that favoured rural seats. As a result, the Centre Party remained the largest party in the Reichstag after winning 101 of the 397 seats, whilst the SPD won only 43. Voter turnout was 84.7%.
Folketing elections were held in Denmark on 28 October 1947, except in the Faroe Islands where they were held on 18 February 1948. The Social Democratic Party remained the largest in the Folketing, with 57 of the 150 seats. Voter turnout was 86% in Denmark proper and 60% in the Faroes.
Federal elections were held in Switzerland on 28 October 1928. Although the Social Democratic Party received the most votes, the Free Democratic Party remained the largest party in the National Council, winning 58 of the 198 seats.
Federal elections were held in Switzerland on 25 October 1931. Although the Social Democratic Party received the most votes, the Free Democratic Party remained the largest party in the National Council, winning 52 of the 187 seats.
Federal elections were held in Switzerland on 25 October 1959. The Social Democratic Party and the Free Democratic Party emerged as the largest parties in the National Council, each winning 51 of the 196 seats.
Federal elections were held in Switzerland on 30 October 1955. The Social Democratic Party emerged as the largest party in the National Council, winning 53 of the 196 seats.
Elections to the Supreme Soviet were held in the Soviet Union on 12 March 1950.
General elections were held in Portugal on 28 April 1918, following a coup by Sidónio Pais in December 1917. The elections were boycotted by the Democratic Party, the Evolutionist Party and the Republican Union, who had won over 90% of the seats in the 1915 elections.
Parliamentary elections were held in Portugal on 16 December 1934, the first following the establishment of the one-party state known as the Estado Novo. The National Union was the only party to contest the elections, and no opposition candidates were allowed to run. It subsequently won all seats in the National Assembly, three of which were taken by women.
Federal elections were held in Switzerland on 27 October 1935. The Social Democratic Party emerged as the largest party in the National Council, winning 50 of the 187 seats.
Federal elections were held in Switzerland on 29 October 1939. The Free Democratic Party emerged as the largest party in the National Council, winning 49 of the 187 seats. Due to the outbreak of World War II, there were no elections in nine of the 25 cantons; Appenzell Ausserrhoden, Lucerne, Neuchâtel, Schwyz, Solothurn, Ticino, Valais, Vaud and Zug. In what became known as "silent elections", a total of 55 candidates were elected unopposed.
The United Labour Social Democratic Party was a political party in Bulgaria.
State elections were held in the Free State of Prussia on 26 January 1919. The elections were held a week after the elections to the federal National Assembly, and were the first elections of Prussian institutions held using proportional representation and with women's suffrage. The election was also the first truly free and fair Prussian election, as it was the first election held after the abolition of the Prussian three-class franchise, which grouped voters by the amount of taxes paid and gave disproportionate weight to the wealthy.
State elections were held in the Free State of Prussia on 20 May 1928 to elect all 450 members of the Landtag of Prussia. The governing coalition of the Social Democratic Party, Centre Party, and German Democratic Party retained its majority. The SPD recorded its best result since 1919 while the opposition German National People's Party suffered significant losses. The Centre Party, German People's Party, and DDP took modest losses; the Communist Party and Wirtschaftspartei made modest gains.
7.65%
4.41pp 
