| Jacques Deny | |
| Birth Date: | 22 October 1916 |
| Birth Place: | Algiers, French Algeria |
| Death Place: | Gerardmer, Lorraine, France |
| Nationality: | French |
| Fields: | Mathematics |
| Workplaces: | Paris-Sud 11 University |
| Alma Mater: | University of Strasbourg |
| Doctoral Advisor: | Henri Cartan |
| Doctoral Students: | Paul-André Meyer |
Jacques Deny (in French dəni/; 22 October 1916 - 1 January 2016) was a French mathematician. He made notable contributions to the field of analysis, in particular potential theory.[1]