Mainz (electoral district)
| 204 Mainz | |
|---|---|
| Electoral district for the Bundestag | |
Mainz in 2025 | |
| State | Rhineland-Palatinate |
| Population | 353,600 (2019) |
| Electorate | 251,092 (2025) |
| Major settlements | Mainz Ingelheim am Rhein Bingen am Rhein |
| Area | 467.3 km2 |
| Current electoral district | |
| Created | 1949 |
| Member | Vacant |
| Elected | 2025 |
Mainz is an electoral constituency (German: Wahlkreis) represented in the Bundestag. It elects one member via first-past-the-post voting. Under the current constituency numbering system, it is designated as constituency 204. It is located in eastern Rhineland-Palatinate, comprising the city of Mainz and the northern part of the Mainz-Bingen district.
Mainz was created for the inaugural 1949 federal election. Whilst the Christian Democratic Union won the plurality in the 2025 election, under the new voting system, their candidate did not actually win a seat in the Bundestag. This was due to the distribution of seats won by the CDU being decided by the first (direct) vote percentage of each winning CDU candidate, determining who took the seats. As the CDU candidate got a low vote of 27.3%, the seat will remain vacant throughout the 21st Bundestag.