Today's city is a result of numerous incorporations of surrounding towns and smaller cities. It is the twelfth-largest city in Germany and the fifth-largest city in North Rhine-Westphalia with 495,668 residents as of 31 December 2007. The city is renowned for its steel industry. There is still one coal mine in operation, but Duisburg has never been a coal-mining center to the same extent as other places in the Ruhr. All blast furnaces in the Ruhr are now located in Duisburg. 49% of all hot metal and 34.4% of all pig-iron in Germany is produced here (as of 2000). The University of Duisburg-Essen, with 33,000 students, ranks among the 10 largest German universities.
Duisburg is situated on the confluence of the Ruhr and Rhine. The city extends across both banks of the two rivers.
The city is divided into 7 districts, sub-divided into 46 suburbs as follows: