The Aachen-Düsseldorf-Ruhrort Railway Company was a German railway company founded in 1850 and taken over by the Bergisch-Märkische Railway Company in 1862. It was founded on 4 March 1850 as the Royal Division of the Aachen-Dusseldorf-Ruhrort Railway (German: Königliche Direction der Aachen-Düsseldorf-Ruhrorter Eisenbahn) based in Aachen, taking over the operation from 1 April 1850 of two railway companies that had been working together since their founding:
The Ruhrort-Crefeld District Gladbach Railway Company built the Homberg am Rhein via Krefeld to Viersen with a length of 33.6 kilometres and opened it on 15 October 1849. Because of financial difficulties, the company received a government guarantee on its interest payments. Under an agreement of 26 September 1846, it was agreed that the Prussian state would be responsible for both companies in order to promote construction and operation of the railways.
As of 1 April 1850, the two railway companies came under the management of the Aachen-Düsseldorf-Ruhrort Railway Company in Aachen.
Lines were opened as follows:
| Section | Length | Opened |
|---|---|---|
| Viersen – Gladbach | 8.6 km | 15 October 1851 |
| Gladbach – Rheydt | 3.8 km | 12 August 1852 |
| Rheydt – Herzogenrath | 44.0 km | 12 November 1852 |
| Herzogenrath – Aachen | 13,2 km | 17 January 1853 |
| Aachen – Germany/Belgium border | 2.7 km | 23 October 1854 |
| Gladbach – Old Oberkassel | 24.2 km | 17 January 1853 |
| Old Oberkassel – Rheinstation | 0.9 km | 16 October 1854 |
Rheinstation was a freight station only, where goods could be transferred to river boats on the Rhine or loaded on carts to be hauled over the Düsseldorf pontoon bridge, opened in 1839.
The initiative for the railway line came from the of industrialists of Krefeld and Mönchengladbach, who intended to give domestic industry cheap access to raw materials from overseas via the port of Antwerp and to cheap supplies of coal from the Ruhr. At the same time the rail links would facilitate the marketing of their products. To avoid the difficult transhipment of goods for the crossing of the Rhine–the military had not allowed the construction of a railway bridge from Ruhrort to Homberg–the Ruhrort-Crefeld District Gladbach Railway Company signed a contract on 29 March 1849 with the Cologne-Minden Railway Company to operate a train ferry for freight wagons and passenger carriages across the river between Ruhrort and Homberg.
The Ruhrort–Homberg train ferry commenced operations on 12 November 1852. Initially carriages were lowered by ropes down a ramp to the non-powered pontoon and raised on the other side with ropes hauled by a locomotive. A steam ship towed coupled pontoons over the river. It was able to transfer up to 700 carriages a month. In 1854, to increase the efficiency of ferry operation, both companies started building lift towers on both banks through which carriages could be hydraulically raised or lowered to the ferries. After the commissioning of the towers in 1 May 1856, the number of carriages that could be handled increased from about 30,000 to 50,000 cars annually.
With the opening of the Witten/Dortmund–Oberhausen/Duisburg line via Essen in 1862, the Bergisch-Märkische Railway Company gained its own access to the coal mines of the Ruhr and was thus able to offer the only competition to the operations of the Cologne-Minden Railway Company. To export coal towards Belgium, Netherlands and shipping ports it built a connecting line from Mülheim-Styrum to the river port at Ruhrort, which was completed in 1867.
To achieve its broader goals, it turned to the Prussian government for funds to acquire all the available shares of the Aachen-Düsseldorf-Ruhrort Railway Company. On 1 January 1866, the Aachen-Düsseldorf-Ruhrort Railway Company was merged with the Bergisch-Märkisches Railway Company and, on 8 January 1866, the management of the railway was transferred to the administration of the Bergisch-Märkisches Railway Company in Elberfeld and the administration in Aachen was closed.