Solingen is a city in North Rhine-Westphalia, Germany. It is located some 25 km east of Düsseldorf along the northern edge of the region called Bergisches Land, south of the Ruhr area, and, with a 2009 population of 161,366, is after Wuppertal the second largest city in the Bergisches Land. It is a member of the regional authority of the Rhineland.

Solingen is called the "City of Blades", since it has long been renowned for the manufacturing of fine swords, knives, scissors and razors made by famous firms such as WKC, DOVO, Wüsthof, Zwilling J. A. Henckels, Böker, Hubertus, Diefenthal, Puma, Clauberg, Eickhorn, Linder, Carl Schmidt Sohn, Dreiturm, Herder, and numerous other manufacturers.

In Medieval times, the swordsmiths of Solingen designed the town's coat of arms, which continues to the present. In the latter part of the 17th century, a group of swordsmiths from Solingen broke their guild oaths by taking their sword-making secrets with them to Shotley Bridge, County Durham in England.

Main sights include:

• Schloss Burg, the castle of the counts of Berg
• üngsten Bridge, a railway bridge connecting Solingen with the neighbour town of Remscheid. Standing at 107 m above the ground, it is the highest railway bridge in Germany. It was constructed in 1897 and originally named the Kaiser-Wilhelm-Brücke after Wilhelm I
• Klosterkirche, former convent church (1690)
• Museums
• Rhineland Industrial Museum Hendrichs Drop Forge, an Anchor Point of ERIH, The European Route of Industrial Heritage
• Deutsches Klingenmuseum (German Blade Museum), presenting swords and cutlery of all epochs
• Kunstmuseum Solingen (Museum of Art)
• Museum Plagiarius, the Plagiarius exhibition shows more than 350 product units - i.e., original products and their brazen plagiarisms - in direct comparison. The registered society conducts an annual competition that awards the anti-prize "Plagiarius" to those manufacturers and distributors that a jury of peers have found guilty of making or selling "the most flagrant" imitations.