| Election Name: | 1975 Rhineland-Palatinate state election |
| Country: | Rhineland-Palatinate |
| Type: | parliamentary |
| Ongoing: | no |
| Previous Election: | 1971 Rhineland-Palatinate state election |
| Previous Year: | 1971 |
| Next Election: | 1979 Rhineland-Palatinate state election |
| Next Year: | 1979 |
| Seats For Election: | All 100 seats of the Landtag of Rhineland-Palatinate |
| Majority Seats: | 51 |
| Election Date: | 9 March 1975 |
| Leader1: | Helmut Kohl |
| Party1: | Christian Democratic Union of Germany |
| Last Election1: | 53 seats, 50.0% |
| Seats1: | 55 |
| Seat Change1: | 2 |
| Popular Vote1: | 1,143,360 |
| Percentage1: | 53.9% |
| Swing1: | 3.9% |
| Leader2: | Wilhelm Dröscher |
| Party2: | Social Democratic Party of Germany |
| Last Election2: | 44 seats, 40.5% |
| Seats2: | 40 |
| Seat Change2: | 4 |
| Popular Vote2: | 817,018 |
| Percentage2: | 38.5% |
| Swing2: | 2.0% |
| Leader3: | Hans-Otto Scholl |
| Party3: | Free Democratic Party (Germany) |
| Last Election3: | 3 seats, 5.9% |
| Seats3: | 5 |
| Seat Change3: | 2 |
| Popular Vote3: | 118,762 |
| Percentage3: | 5.6% |
| Swing3: | 0.3% |
| Minister-President | |
| Before Election: | Helmut Kohl |
| Before Party: | Christian Democratic Union of Germany |
| After Election: | Helmut Kohl |
| After Party: | Christian Democratic Union of Germany |
The 1975 Rhineland-Palatinate state election was conducted on 9 March 1975 to elect members to the Landtag, the state legislature of Rhineland-Palatinate, West Germany.
Ahead of this election, the state electoral reform on 4 July 1972 reduced the constituencies from six to four:
The seats would be allocated with d'Hondt method.|-|colspan=15| |-! style="background-color:#E9E9E9;text-align:left;" width=300px colspan=2|Party! style="background-color:#E9E9E9;text-align:right;" width=50px |Vote #! style="background-color:#E9E9E9;text-align:right;" width=50px |Vote %! style="background-color:#E9E9E9;text-align:right;" width=50px |Vote % ±! style="background-color:#E9E9E9;text-align:right;" width=50px |Seats! style="background-color:#E9E9E9;text-align:right;" width=50px |Seats ±|-| width=5px style="background-color: " || style="text-align:left;" | Christian Democratic Union| style="text-align:right;" | 1,143,360| style="text-align:right;" | 53.9| style="text-align:right;" | +3.9| style="text-align:right;" | 55| style="text-align:right;" | +2|-| style="background-color: " || style="text-align:left;" | Social Democratic Party| style="text-align:right;" | 817,018| style="text-align:right;" | 38.5| style="text-align:right;" | –2.0| style="text-align:right;" | 40| style="text-align:right;" | –4|-| style="background-color: " || style="text-align:left;" | Free Democratic Party| style="text-align:right;" | 118,762| style="text-align:right;" | 5.6| style="text-align:right;" | –0.3| style="text-align:right;" | 5| style="text-align:right;" | +2|-| style="background-color: " || style="text-align:left;" | National Democratic Party| style="text-align:right;" | 22,942| style="text-align:right;" | 1.1| style="text-align:right;" | –1.6| style="text-align:right;" | 0| style="text-align:right;" | ±0|-| style="background-color: " || style="text-align:left;" | German Communist Party| style="text-align:right;" | 11,101 | style="text-align:right;" | 0.5| style="text-align:right;" | –0.4| style="text-align:right;" | 0| style="text-align:right;" | ±0|- | style="background-color: " || style="text-align:left;" | Others| style="text-align:right;" | 7,298| style="text-align:right;" | 0.3| style="text-align:right;" | N/A| style="text-align:right;" | 0| style="text-align:right;" | N/A|- style="background: #E9E9E9"! style="text-align:left;" colspan=2| Total| 2,120,481| 100.0| —| 100| ±0|-| colspan=9 style="text-align:left;" | Source: parties-and-elections.de|}