Krefeld (German pronunciation: [ˈkʁeːfɛlt]), also known as Crefeld until 1929, is a city in North Rhine-Westphalia, Germany. It is located northwest of Düsseldorf, its centre lying just a few kilometres to the west of the River Rhine; the borough of Uerdingen is situated directly on the Rhine. Krefeld is accessed by the autobahns A57 (Cologne–Nijmegen) and the A44 (Aachen–Düsseldorf–Dortmund–Kassel).

Krefeld is also called the "Velvet and Silk City".

Since 1962, the city has hosted an "honors program in foreign language (German) studies" for high school students from Indiana, United States. The program annually places approximately thirty carefully selected high school juniors with families in and around Krefeld for intensive German language training.

Krefeld's residents speak Hochdeutsch, the standard German taught to all people in Germany. However, the native dialect is a Low German variety, sometimes locally called Krefelder Plattdeutsch, Krieewelsch Platt, Plattdeutsch, or sometimes simply Platt. The Uerdingen line isogloss, separating general dialectical areas in Germany and neighbouring Germanic-speaking countries, runs through and is named after Krefeld's Uerdingen district, originally an independent municipality. The city is also home to a production line for the iconic Class 380 Rail car for export to the UK market.