Archbishop Anno II of Cologne founded a Benedictinemonastery 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.