In Germany, the largest European city network comprises around 800 cities, municipalities and rural districts. Throughout Europe, the CEMR represents around 150,000 municipalities and regional authorities. As the association with the largest membership, the Council of European Municipalities and Regions forms a strong lobby for municipal interests at European level. In addition, the CEMR provides information on municipal relevant European developments, European policy issues, funding programmes and town twinning. As a member of the Council of European Municipalities and Regions, the Council of the City of Bonn sends political representatives to the bodies of the CEMR. These include the presidium, the main committee and the three technical committees: the Franco-German Committee, the German-Polish Committee and the Committee for Municipal Development Cooperation. In addition, employees of the City of Bonn regularly discuss current issues of the European political agenda and their impact on local authorities in the working group of EU and funding officers.

In the EUROCITIES network of cities, the City of Bonn works together with 140 of the largest European cities in the fields of culture, mobility, social affairs, the environment, business and the knowledge society to elaborate local positions which the network brings into the European political debate. The focus is on dialogue with representatives at European level, cooperation in working groups and the planning and implementation of joint projects.

In forums and working groups on culture, mobility, social issues, the environment, the economy and the knowledge society, employees of the City of Bonn are involved, for example, through specialist lectures on the implementation of the Sustainable Development Goals in Bonn or by participating in a case study on climate action and adaptation.