Stadtmuseum Bonn, City museum in central Bonn, Germany.

The Stadtmuseum Bonn occupies two floors of a 1970s building at Franziskanerstraße 9, opposite the university building next to the Koblenzer Tor; the floors once belonged to the sauna and cleaning wing of the abandoned Viktoriabad. Its permanent exhibition, "From Roman times to today", opened on 14 January 1998 on 1000 square metres and covers roughly 2000 years of city history, from an ancient floor mosaic and the medieval "Bonner Löwe" to a complete 1893 colonial goods shop, a 1900 hairdressing salon and two bourgeois parlours of the turn of the century.

The museum was founded in 1989 during Bonn's 2000th anniversary celebrations and opened its main exhibition in 1998. The collection spans centuries of the city's development and transformation.

The collection grew largely from bequests made in the second half of the 20th century, among them Curt Delander's donation; its foundation was the art collection of physician Franz Obernier (1839–1888), mainly 19th-century painting of the Düsseldorf and Munich schools. Works by Marianne Pitzen, Karl Rudolf Sohn, Karl Ferdinand Sohn, Heinrich Wettig and Gustav Wunderwald are shown today.

The museum welcomes visitors on Saturdays from 1 PM to 6 PM and Sundays from 11 AM to 4 PM. Museum volunteers provide guided tours to help visitors understand the collections better.

The museum's first home was the small Ernst-Moritz-Arndt-Haus at Adenauerallee 79, which still hosts smaller special exhibitions and cultural events. The main collection moved to Franziskanerstraße only in 1998, nine years after the museum was founded.