Jonas Gustav Vilhelm Zander (March 29, 1835 in Stockholm – June 17, 1920) was a Swedish physician, orthopedist and one of the originators of mechanotherapy. He is known for inventing a therapeutic method of exercise carried out by means of a special apparatus. He began his work in 1860s and established Zander Institute in London.
In 1880 he became a lecturer of the Stockholm University, and in 1896 he became a member of the Royal Swedish Academy of Sciences.