| Jean-Maurice Demarquet | |
| Birth Date: | 20 August 1923 |
| Birth Place: | Martigues, Bouches-du-Rhône, France |
| Death Place: | Boulogne-Billancourt, Hauts-de-Seine, France |
| Occupation: | Politician |
| Relatives: | André Honnorat (great-uncle) |
Jean-Maurice Demarquet (20 August 1923 – 26 September 1989) was a French politician. He served as a member of the National Assembly from 1956 to 1958, representing Finistère.[1] Fighting in French Algeria, he participated in Barricades Week in 1960, then fled to Spain. He later joined the National Rally.