Postamt Köthen, Historical post office building in Köthen, Germany.

Postamt Köthen is a brick building whose 50-metre south wing runs along Lindenstraße with eleven window axes. The 1903–04 eastern extension added an east wing and a second building with seven axes facing east, extending the south facade by eight axes. A tower on the north side of the east wing lost its Jugendstil roof, and the east portal has a triangular gable with columns and reliefs.

The building was constructed between 1883 and 1884 under government architect Hausmann and shaped the city's late 19th-century landscape. An eastern expansion occurred during 1903 and 1904.

The post office and adjacent residential house from the Gründerzeit period together shape the look of Neustädter Platz. These buildings form a visual anchor for the neighborhood and display the architectural styles of their different eras.

The western section was transformed into Haus am Schlosspark in 2020, now offering assisted living services. The historic structure remains visible from outside and can be explored while walking around the plaza.

The courtyard of the post office still holds the former stable building, which probably also served as a carriage house (Remise). It is a rare surviving service structure of the postal complex on Lindenstraße.