Porz borders with the Cologne boroughs of Kalk and Innenstadt to the north, Rheinisch-Bergischer Kreis and Rhein-Sieg-Kreis to the east and south, and the Rhine to the west.
In the course of the local government reform in the 1970s in North Rhine-Westphalia, Porz was incorporated with Cologne.
Porz consists of 16 Stadtteile (city parts): Organisations based in Porz include The German Aerospace Center, TÜV Rheinland, The European Astronaut Centre of the European Space Agency, and the Cologne-Bonn airport.
[2] The Executive Transport Wing of the German Air Force is based on the military part of the Cologne-Bonn airport and contributes to the local economy by the large number of soldiers stationed there.
Regional train station include Porz (Rhein), Porz-Wahn, Köln-Steinstraße, and Köln-Airport Business Park.