Niederdollendorf railway station is a station on the East Rhine Railway in the Königswinter suburb of Niederdollendorf in the Rhein-Sieg-Kreis district of North Rhine-Westphalia, Germany. It is a protected as a monument. The station was opened on 11 July 1870 as part of the extension of the East Rhine Railway from Neuwied to Oberkassel.

The Rhein-Erft-Express is a Regional-Express service in the German states of North Rhine-Westphalia and Rhineland-Palatinate. It is numbered as line RE 8 and connects the cities of Mönchengladbach, Cologne, Bonn and Koblenz with each other and their surroundings, running hourly. It is complemented by a Regionalbahn stopping service, the Rhein-Erft-Bahn, running also between Mönchengladbach Hauptbahnhof and Koblenz Hauptbahnhof. On weekends it stops at some additional stations between Cologne Hbf and Koblenz Hbf. It is operated by DB Regio with Alstom Coradia Continental EMUs.