The 1920 Brunswick state election was held on 16 May 1920 to elect the 60 members of the Landtag of the Free State of Brunswick. [1]
| Party | Votes | % | Seats | +/– | |
|---|---|---|---|---|---|
| Brunswick State Electoral Association | 86,161 | 37.32 | 23 | +7 | |
| Independent Social Democratic Party of Germany | 86,123 | 37.31 | 23 | +9 | |
| Social Democratic Party of Germany | 34,237 | 14.83 | 9 | –8 | |
| German Democratic Party | 21,899 | 9.49 | 5 | –8 | |
| Communist Party of Germany | 2,423 | 1.05 | 0 | New | |
| Total | 230,843 | 100.00 | 60 | 0 | |
| Valid votes | 230,843 | 99.85 | |||
| Invalid/blank votes | 344 | 0.15 | |||
| Total votes | 231,187 | 100.00 | |||
| Registered voters/turnout | 301,941 | 76.57 | |||
| Source: Elections in the Weimar Republic, [1] Elections in Germany [2] | |||||