List of Famous people who died at 91

Fritz Gassmann (1899–1990) was a Swiss mathematician and geophysicist.

Julien Maitron was a French professional road bicycle racer, who competed in the 1904 to 1912 Tours de France. He won one stage in the 1910 Tour de France, and had his best overall position in the 1904 Tour de France when he finished fifth.

Wang Yun-wu was an influential Chinese publisher, politician scholar of history and political science; He also invented the Shih Chiao Hao Ma, a method of Chinese lexicography also sometimes referred to as the Four Corner Method.

Georg Muche was a German painter, printmaker, architect, author, and teacher.

Patrick Aloysius O'Boyle was an American prelate of the Roman Catholic Church. He served as the first resident Archbishop of Washington from 1948 to 1973, and was elevated to the cardinalate in 1967.

Georges Cabana was a Canadian Roman Catholic priest and Archbishop of Sherbrooke from 1952 to 1967.

John Joseph Francis Mulhall was an American film actor beginning in the silent film era who successfully transitioned to sound films, appearing in over 430 films in a career spanning 50 years.