Alzenau | |
|---|---|
Town hall | |
| Coordinates: 50°04′N 09°04′E / 50.067°N 9.067°E | |
| Country | Germany |
| State | Bavaria |
| Admin. region | Lower Franconia |
| District | Aschaffenburg |
| Subdivisions | 6 Stadtteile |
| Government | |
| • Mayor (2020–26) | Stephan Noll (CSU) |
| Area | |
| • Total | 59.33 km2 (22.91 sq mi) |
| Elevation | 126 m (413 ft) |
| Population (2024-12-31) | |
| • Total | 18,034 |
| • Density | 300/km2 (790/sq mi) |
| Time zone | UTC+01:00 (CET) |
| • Summer (DST) | UTC+02:00 (CEST) |
| Postal codes | 63755 |
| Dialling codes | 06023 |
| Vehicle registration | AB, ALZ |
| Website | www.alzenau.de |
Alzenau (German: [ˈaltsənaʊ] (ⓘ); until 31 December 2006 officially Alzenau i.UFr.) is a town in the north of the Aschaffenburg district in the Regierungsbezirk of Lower Franconia (Unterfranken) in Bavaria, Germany. Until 1 July 1972, Alzenau was the district seat of the now ended district of the same name and has a population of around 19,000.
Alzenau borders in the north on the communities of Rodenbach and Freigericht, in the east and southeast on the communities of Mömbris and Johannesberg, in the southwest on the community of Karlstein and in the west on the community of Kahl am Main.

Alzenau's quarters are Albstadt, Hörstein, Kälberau, Michelbach and Wasserlos.
Alzenau's town council has 24 seats.
| Alzenau town council elections | ||||||||
|---|---|---|---|---|---|---|---|---|
| Date | Voter turnout | CSU | SPD | FDP | Grüne | FW/PWG | KL | JU |
| 3 March 2002 | 58.4% | 12 seats | 6 seats | 2 seats | 2 seats | 2 seats | – | – |
| 2 March 2008 | 58.8% | 11 seats | 5 seats | 2 seats | 3 seats | 2 seats | 1 seat | – |
| 30 August 2021 | 10 seats | 3 seats | 2 seats | 5 seats | 3 seats | – | 1 seat | |
In 1999, the following institutions existed:

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