|Mayor||Franz Huhn (CDU)|
|Area||23.47 km2 (9.06 sq mi)|
|Elevation||60 m (197 ft)|
|Population||39,795 (31 December 2011)|
|- Density||1,696 /km2 (4,392 /sq mi)|
|Time zone||CET/CEST (UTC+1/+2)|
Siegburg (i.e. fort on the Sieg river) is a city in the district of Rhein-Sieg-Kreis, in North Rhine-Westphalia, Germany. It is located on the banks of the rivers Sieg and Agger, 10 kilometres from the former capital Bonn and 26 kilometres from Cologne.
Archbishop Anno II of Cologne founded a Benedictine monastery in 1064, known as Michaelsberg Abbey, on top of the hill also called the Michaelsberg. A settlement that arose from that was first mentioned as a city in 1182. Siegburg reached the height of its prosperity in the 15th and 16th century. It is famous for its pottery, especially for the Siegburg pitchers (Siegburger Krüge).
Siegburg has been the county seat of the Rhein-Sieg-Kreis since 1816.
Twin cities 
- Nogent-sur-Marne, France
- Guarda, Portugal
- Bolesławiec, Poland
- Selçuk, Turkey
- Orestiada, Greece
- Yuzawa, Japan
Notable residents 
- Engelbert Humperdinck (September 1, 1854 – September 27, 1921), German composer, of Hänsel und Gretel fame
- Wolfgang Overath (born September 29, 1943), former Germany national football team player; member of team which won the 1974 FIFA World Cup
- Catharina Felser (born October 2, 1982), racing-car driver
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