The circus was founded in 1803 by the Knie family and has existed in its present form since 1919, when it changed from an open arena to a covered tent.
The circus has long been famous for its animals and now operates a zoo (Knie's Kinderzoo) while its museum in Rapperswil closed in July 2017.
Today, the circus is an enterprise with about 200 employees, operated by Frédy and Franco Knie in partnership with insurance company Swiss Life.
[1] In 2000, it was the focus on Hanna & Knill including six clown cabarets with Ueli Bichsel, Neda und Maite, and Gardi Hutter.
[2] Ursus & Nadeschkin became in 2002 the leading act and headline of the Circus Knie, performing 257 times during the 2002 season tour and having an audience totaling one million spectators.