| Juan de Dios Martínez | |
| Order: | 23rd |
| Office: | President of Ecuador |
| Term Start: | 5 December 1932 |
| Term End: | 19 October 1933 |
| Predecessor: | Alberto Guerrero |
| Successor: | Abelardo Montalvo |
| Birth Date: | 9 March 1875 |
| Birth Place: | Guayaquil, Ecuador |
| Death Place: | Guayaquil, Ecuador |
| Party: | Radical Liberal |
Juan de Dios Martínez Mera (9 March 1875 - 27 October 1955) was 23rd President of Ecuador from 1932 to 1933. He was President of the Chamber of Deputies in 1921. He was Minister of Finance from 1929 to 1930, and from 1931 to 1932.
In Quito, a main avenue is named after him.
He graduated with a bachelor's degree from San Vicente de el Guayas. He studied jurisprudence.[1]