Ingolstadt (ˈɪŋɡɔlˌʃtat, Austro-Bavarian: ˈɪŋl̩ʃtɔːd) is an independent city on the Danube in Upper Bavaria with 139,553 inhabitants (as of June 30, 2022). Around half a million people live in the metropolitan area. Ingolstadt is the second largest city in Upper Bavaria after Munich and the fifth largest city in Bavaria after Munich, Nuremberg, Augsburg and Regensburg. The city passed the mark of 100,000 inhabitants in 1989 and has since been one of the major cities in Germany. After Regensburg, Ingolstadt is the second largest German city on the Danube.
The city was first mentioned in 806. In the late Middle Ages, the city was one of the capitals of the Bavarian duchies alongside Munich, Landshut and Straubing, which is reflected in the architecture. On March 13, 1472, Ingolstadt became the seat of the first university in Bavaria, which later distinguished itself as the center of the Counter-Reformation. The freethinking Illuminati order was also founded here in 1776 . The city was also a Bavarian state fortress for more than 400 years. The historic old town has been preserved.
There are two colleges in the city. The place is one of the three regional centers in Bavaria. The city is mainly characterized by the manufacturing industry, such as automobile and mechanical engineering. The unemployment rate was 3.3% in February 2022.
Covering an urban area of , Ingolstadt is geographically Bavaria's fourth-largest city after Munich, Nuremberg and Augsburg. At its largest point the city is about from east to west and from north to south about . The city boundary has a length of .
The city boundary is about away from the geographic centre of Bavaria in Kipfenberg. The old town is approximately above sea level and the highest point, located in the district of Pettenhofen, is . The lowest point of the Schutter confluence with the Danube is at above sea level. Ingolstadt uses Central European Time as throughout Germany; the average time lag is 14 minutes.
The city is expanding at the northern and southern banks of the Danube in a wide flat bowl.