Kerpen is the most populated town in the Rhein-Erft-Kreis. It is located about 20 kilometres southwest from Cologne. As of 2023, Kerpen ha…Kerpen is the most populated town in the Rhein-Erft-Kreis. It is located about 20 kilometres southwest from Cologne. As of 2023, Kerpen has a total population of 67,627. The town of Kerpen was created in 1975, when the previously independent municipalities Balkhausen, Blatzheim, Brüggen, Buir, Horrem, Kerpen, Manheim, Mödrath, Sindorf and Türnich were merged.