Charles Émile Troisier (6 April 1844 – 11 December 1919) was a French surgeon.

Charles Émile Troisier was born on 6 April 1844 in Sévigny-Waleppe, Ardennes.

His mother was Marie-Louise Adeline Marache and his father Antoine Édouard Troisier, a health officer at Sévigny.

[2] His son, Jean Troisier (1881–1945), also became a doctor and biologist, and was head of the laboratory at the Pasteur Institute.

[3] His granddaughter, Solange Troisier (1919–2008) was a doctor and a leading feminist.