| Election Name: | 1990 Saarland state election |
| Country: | Saarland |
| Type: | parliamentary |
| Ongoing: | no |
| Previous Election: | 1985 Saarland state election |
| Previous Year: | 1985 |
| Next Election: | 1994 Saarland state election |
| Next Year: | 1994 |
| Seats For Election: | All 51 seats of the Landtag of Saarland |
| Majority Seats: | 26 |
| Election Date: | 28 January 1990 |
| Turnout: | 694,101 (83.2%) 1.8% |
| Leader1: | Oskar Lafontaine |
| Party1: | Social Democratic Party of Germany |
| Last Election1: | 26 seats, 49.2% |
| Seats1: | 30 |
| Seat Change1: | 4 |
| Popular Vote1: | 377,501 |
| Percentage1: | 54.4% |
| Swing1: | 5.2% |
| Leader2: | Klaus Töpfer |
| Party2: | Christian Democratic Union of Germany |
| Last Election2: | 20 seats, 37.3% |
| Seats2: | 18 |
| Seat Change2: | 2 |
| Popular Vote2: | 231,983 |
| Percentage2: | 33.4% |
| Swing2: | 3.9% |
| Party3: | Free Democratic Party (Germany) |
| Seats3: | 3 |
| Seat Change3: | 2 |
| Popular Vote3: | 39,113 |
| Percentage3: | 5.6% |
| Swing3: | 4.4% |
| Minister-President | |
| Before Election: | Oskar Lafontaine |
| Before Party: | Social Democratic Party of Germany |
| After Election: | Oskar Lafontaine |
| After Party: | Social Democratic Party of Germany |
The 1990 Saarland state election was held on 28 January 1990 to elect the members of the Landtag of Saarland. The incumbent Social Democratic Party (SPD) government led by Minister-President Oskar Lafontaine was returned with an increased majority and continued in office.
The table below lists parties represented in the previous Landtag of Saarland.
| Name | Ideology | Leader(s) | 1985 result | |||||
|---|---|---|---|---|---|---|---|---|
| Votes (%) | Seats | |||||||
| bgcolor= | SPD | Social Democratic Party of Germany | Social democracy | Oskar Lafontaine | 49.2% | |||
| bgcolor= | CDU | Christian Democratic Union of Germany | Christian democracy | Klaus Töpfer | 37.3% | |||
| bgcolor= | FDP | Free Democratic Party | Classical liberalism | 10.0% | ||||
|-! colspan="2" | Party! Votes! %! +/-! Seats ! +/-! Seats %|-| bgcolor=| | align=left | Social Democratic Party (SPD)| align=right| 377,502| align=right| 54.4| align=right| 5.2| align=right| 30| align=right| 4| align=right| 58.8|-| bgcolor=| | align=left | Christian Democratic Union (CDU)| align=right| 231,983| align=right| 33.4| align=right| 3.9| align=right| 18| align=right| 2| align=right| 35.3|-| bgcolor=| | align=left | Free Democratic Party (FDP)| align=right| 39,113| align=right| 5.6| align=right| 4.4| align=right| 3| align=right| 2| align=right| 5.9|-! colspan=8||-| bgcolor=| | align=left | The Republicans (REP)| align=right| 23,263| align=right| 3.4| align=right| 3.4| align=right| 0| align=right| ±0| align=right| 0|-| bgcolor=| | align=left | Alliance 90/The Greens (Grüne)| align=right| 18,380| align=right| 2.6| align=right| 0.1| align=right| 0| align=right| ±0| align=right| 0|-| bgcolor=|| align=left | Others| align=right| 3,860| align=right| 0.6| align=right| | align=right| 0| align=right| ±0| align=right| 0|-! align=right colspan=2| Total! align=right| 694,101! align=right| 100.0! align=right| ! align=right| 51! align=right| ±0! align=right| |-! align=right colspan=2| Voter turnout! align=right| ! align=right| 83.2! align=right| 1.8! align=right| ! align=right| ! align=right| |}