| Election Name: | 1990 Thuringia state election |
| Country: | Thuringia |
| Type: | parliamentary |
| Ongoing: | no |
| Previous Election: | 1950 East German state elections |
| Previous Year: | 1950 (GDR) |
| Next Election: | 1994 Thuringian state election |
| Next Year: | 1994 |
| Seats For Election: | All 89 seats in the Landtag of Thuringia |
| Majority Seats: | 45 |
| Election Date: | 14 October 1990 |
| Turnout: | 1,403,354 (71.7%) |
| Leader1: | Josef Duchač |
| Party1: | Christian Democratic Union of Germany |
| Seats1: | 44 |
| Popular Vote1: | 637,055 |
| Percentage1: | 45.4% |
| Leader2: | Friedhelm Farthmann |
| Party2: | Social Democratic Party of Germany |
| Seats2: | 21 |
| Popular Vote2: | 319,376 |
| Percentage2: | 22.8% |
| Leader3: | Gabi Zimmer |
| Party3: | Party of Democratic Socialism (Germany) |
| Seats3: | 9 |
| Popular Vote3: | 136,464 |
| Percentage3: | 9.7% |
| Leader4: | Hartmut Sieckmann |
| Party4: | Free Democratic Party (Germany) |
| Seats4: | 9 |
| Popular Vote4: | 130,035 |
| Percentage4: | 9.3% |
| Party5: | Alliance 90/The Greens |
| Seats5: | 6 |
| Popular Vote5: | 90,829 |
| Percentage5: | 6.5% |
| Map Size: | 350px |
| Minister-President | |
| After Election: | Josef Duchač |
| After Party: | Christian Democratic Union of Germany |
The 1990 Thuringia state election was held on 14 October 1990 to elect the members of the first Landtag of Thuringia. It was the first election held in Thuringia since the reunification of Germany, which took place on 3 October. The Christian Democratic Union (CDU) led by Josef Duchač emerged as the largest party with 45.4%, followed by the Social Democratic Party (SPD) with 22.8%. The CDU formed a coalition with the Free Democratic Party (FDP), and Duchač became Thuringia's first post-reunification Minister-President.
The table below lists parties which won seats in the election.
| Name | Ideology | Leader(s) | ||||
|---|---|---|---|---|---|---|
| bgcolor= | CDU | Christian Democratic Union of Germany | Christian democracy | Josef Duchač | ||
| bgcolor= | SPD | Social Democratic Party of Germany | Social democracy | Friedhelm Farthmann | ||
| bgcolor= | PDS | Party of Democratic Socialism | Democratic socialism | Gabi Zimmer | ||
| bgcolor= | FDP | Free Democratic Party | Classical liberalism | Hartmut Sieckmann | ||
| bgcolor= | Grüne | New Forum/The Greens/Democracy Now | Green politics | |||
|-! colspan="2" | Party! Votes! %! Seats ! Seats %|-| bgcolor=| | align=left | Christian Democratic Union (CDU)| align=right| 637,055| align=right| 45.4| align=right| 44| align=right| 49.4|-| bgcolor=| | align=left | Social Democratic Party (SPD)| align=right| 319,376| align=right| 22.8| align=right| 21| align=right| 23.6|-| bgcolor=| | align=left | Party of Democratic Socialism (PDS)| align=right| 136,464| align=right| 9.7| align=right| 9| align=right| 10.1|-| bgcolor=| | align=left | Free Democratic Party (FDP)| align=right| 130,035| align=right| 9.3| align=right| 9| align=right| 10.1|-| bgcolor=| | align=left | New Forum/The Greens/Democracy Now (Grüne)| align=right| 90,829| align=right| 6.5| align=right| 6| align=right| 6.7|-! colspan=8||-| bgcolor=| | align=left | German Social Union (DSU)| align=right| 45,979| align=right| 3.3| align=right| 0| align=right| 0|-| bgcolor=|| align=left | Others| align=right| 43,616| align=right| 3.1| align=right| 0| align=right| 0|-! align=right colspan=2| Total! align=right| 1,403,354! align=right| 100.0! align=right| 89! align=right| |-! align=right colspan=2| Voter turnout! align=right| ! align=right| 71.7! align=right| ! align=right| |}