Othmarschen (German pronunciation: [ˈoːtˌmaːɐ̯ʃn̩] ⓘ) is a quarter in the Altona borough of Hamburg in northern Germany.

In 2006 according to the statistical office of Hamburg and Schleswig-Holstein, the quarter Othmarschen has a total area of 6 km2.

The border in the North to the quarters Groß Flottbek and Bahrenfeld is the railway track of the city train.

[6] In Othmarschen is the Jenisch park and the Hindenburgpark and the Schröders Elbpark directly to the beach of the river Elbe.

The Consulate General of the People's Republic of China established in Hamburg in 1921 is located at Elbchaussee 268.

[7] The Asklepios Klinik Altona is a general hospital with 922 beds located Paul-Ehrlich-Strasse.

According to the Department of Motor Vehicles (Kraftfahrt-Bundesamt), in the quarter were 5,475 private cars registered (464 cars/1000 people).