Gustav Ammann (9 July 1885 – 23 March 1955) was a Swiss landscape architect who worked in the modernist style and influenced garden architecture in Switzerland.

[1] Ammann was the son of the president of the Bürgli District Court in Zurich-Enge, and grew up in a middle-class environment.

He attended the Cantonal Commercial School, Zurich, but left his federal diploma in favor of an apprenticeship with a landscaping company run by Leopold Frobel, from 1903 to 1905.

There he attended lectures by its director, Hans Schinz, who also served as a professor of botany at the University of Zurich.

[3] From 1909 to 1911, he worked at the offices of several landscaping architects, including Franz Paetz (Düsseldorf), Ludwig Lesser - known for the namesake park (Berlin), and Jacob Ochs (Hamburg), where German landscape artist Leberecht Migge later became the artistic director.