State elections were held in the Free State of Prussia on 20 May 1928 to elect all 450 members of the Landtag of Prussia.Dieter Nohlen & Philip Stöver (2010) Elections in Europe: A data handbook, p762 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 Economic Party made modest gains.

Results Party Votes % Swing Seats +/– Social Democratic Party (SPD) 5,464,767 29.00 +4.11 137 +23 German National People's Party (DNVP) 3,274,897 17.38 –6.32 82 –27 Centre Party (Zentrum) 2,737,859 14.53 –3.04 68 –13 Communist Party of Germany (KPD) 2,237,160 11.87 +2.25 56 +12 German People's Party (DVP) 1,602,070 8.50 –1.28 40 –5 Reich Party of the German Middle Class (WP) 850,391 4.51 +2.04 21 +10 German Democratic Party (DDP) 839,530 4.46 –1.44 21 –6 Christian-National Peasants' and Farmers' Party (CNBL) 463,929 2.46 +1.05 12 +6 National Socialist German Workers Party (NSDAP) 346,771 1.84 –0.63 6 –5 People's Justice Party (VRP) 235,750 1.25 New 2 New Völkisch National Bloc (VNB) 205,789 1.09 New 2 New Centre Party of Lower Saxony 132,424 0.70 New 3 New German Farmers' Party (DBP) 88,534 0.47 New 0 New National Minorities of Germany (NMD) 75,717 0.40 –0.08 0 –2 Christian Social Reichs Party 72,734 0.39 New 0 New Left Communists 55,509 0.29 New 0 New German Social Party 38,633 0.21 New 0 New People's Bloc of Inflation Victims 24,218 0.13 –0.09 0 0 Old Social Democratic Party of Germany (ASPD) 18,852 0.10 New 0 New Protestant National Community 15,978 0.08 New 0 New Independent Social Democratic Party (USPD) 12,129 0.06 –0.31 0 0 German Home and Landowners' Party 11,600 0.06 New 0 New Protestant People's Service 10,290 0.05 New 0 New Reichs Party for Craft, Commerce and Trade 6,173 0.03 New 0 New Non-Political List of War Victims etc. 5,960 0.03 New 0 New German Reichs Bloc of the Injured 5,797 0.03 New 0 New Christian National Middle-Class Party 4,793 0.03 New 0 New Party for Justice and Tenant Protection 2,375 0.01 New 0 New Revaluation and Reconstruction Party 1,022 0.01 –0.06 0 0 People's Justice Party (Reich Party for Civil Rights and Deflation) 872 0.00 New 0 New Invalid/blank votes 370,531 1.93 – – – Total 18,842,523 100 – 450 0 Registered voters/turnout 25,152,711 76.39 –2.19 – – Gonschior.de

Results by constituency Constituency SPD DNVP Z KPD DVP WP DDP CNBL NSDAP Other 1. East Prussia 26.8 31.3 7.4 9.5 9.8 2.1 3.8 – 0.8 8.5 2. Berlin 34.0 15.7 3.4 29.6 4.2 2.4 6.5 – 1.4 2.8 3. Potsdam II 30.6 21.5 3.1 17.5 9.1 3.2 9.5 – 1.7 3.8 4. Potsdam I 34.7 22.9 2.2 17.1 6.5 5.1 5.2 0.2 1.6 4.5 5. Frankfurt an der Oder 33.1 29.4 6.1 6.0 8.4 3.9 4.4 2.3 1.0 5.4 6. Pomerania 30.2 41.5 1.0 6.1 5.5 5.0 4.0 0.3 1.5 4.9 7. Breslau 37.8 22.9 15.8 4.5 6.0 3.7 3.0 0.4 0.9 5.0 8. Liegnitz 37.8 24.4 7.9 4.2 6.5 7.1 6.4 0.1 1.2 4.4 9. Oppeln 12.5 16.9 39.9 12.7 2.7 1.3 1.6 1.1 1.0 10.3 10. Magdeburg 43.0 16.8 1.8 7.2 12.7 5.1 5.3 0.3 1.6 6.2 11. Merseburg 23.8 21.4 1.4 24.6 10.2 6.0 4.6 0.3 2.7 5.0 12. Erfurt 28.8 15.8 12.9 11.2 11.3 7.7 4.1 0.8 3.5 3.9 13. Schleswig-Holstein 35.2 22.8 1.1 8.0 13.9 5.5 5.6 0.3 4.0 3.6 14. Weser-Ems 22.8 9.5 24.5 3.5 10.4 2.8 4.5 8.8 5.1 8.1 15. Hanover East 32.7 10.5 1.3 5.8 10.5 4.0 3.6 25.4 2.6 3.6 16. Hanover South 44.0 9.0 5.5 3.5 11.9 3.6 3.9 12.5 3.4 2.7 17. Westphalia North 22.8 8.4 34.5 9.4 7.6 6.0 2.2 3.4 0.9 4.8 18. Westphalia South 29.5 8.6 23.3 11.9 10.6 4.7 4.2 1.3 1.6 4.3 19. Hesse-Nassau 32.4 10.0 15.1 8.1 9.9 4.2 5.7 7.2 3.6 3.8 20. Köln-Aachen 18.5 7.3 42.0 10.4 8.4 4.4 3.2 – 1.1 4.7 21. Koblenz-Trier 11.8 6.7 52.1 4.7 5.8 4.2 1.9 5.8 2.0 5.0 22. Düsseldorf East 19.0 11.9 21.0 22.5 8.9 6.1 3.2 – 1.8 5.6 23. Düsseldorf West 17.2 10.7 35.6 14.7 8.4 6.0 2.5 0.2 1.2 3.5

See also Elections in the Free State of Prussia Weimar Republic

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