Oberkassel is a part of Düsseldorf's district 4, with a population of about 17,000 inhabitants. Oberkassel lies on the west side of the river Rhine, the opposite side of the central district of Düsseldorf.
Oberkassel is an economically well-situated borough with an average income of 61.465 Euro and an unemployment rate below 5%. Nearly half of the households in Oberkassel are single households. The average age is about 45 years.
The settlement Heerdt was first mentioned was in the 9th century CE.
In the 20th century Oberkassel became a quarter of Düsseldorf.
Oberkassel is a socially well-to-do part of Düsseldorf. The average age of Oberkassel's residents is 44.
A large part of Düsseldorf's Japanese population lives in Oberkassel. There is a Japanese kindergarten and a Japanese school in Düsseldorf-Niederkassel, a neighboring district, as well as a Japanese cultural centre, the Eko-House, and a Buddhist temple.
The Japanische Internationale Schule in Düsseldorf (JISD) first opened in a church building in Oberkassel on April 21, 1971, before moving to its permanent home in 1973. From 1983 to 2001 junior high school students of the JISD attended classes at the former Lanker School in Oberkassel.
Coordinates: 51°13′49″N 6°45′18″E / 51.23028°N 6.75500°E