Jeanne-Marie Matthey-Jonais (25 January 1886 – unknown) was a French tennis player. She competed during the first two decades of the 20th century. Matthey won the French Open Women's Singles Championship four times in succession from 1909 to 1912, but lost the 1913 final to Marguerite Broquedis.
In July 1913 she won the singles events at the tournaments of Chantilly and Compiègne. At Chantilly she defeated 16-year-old Suzanne Lenglen in the semifinal and Kate Gillou-Fenwick in the final. At Compiègne later that month she had a walk-over in the final against Lenglen. In October 1913 she won the singles title at the Paris Covered Court Championships, played at the Sporting Club de Paris, after a three-set victory in the final against Broquedis.
In 1927 she received the Legion of Honour for her services as a nurse.
During World War II she was active in the resistance and was interned in concentration camps in 1945.