| Louis Eugène Roy | |
| Office: | 27th President of Haiti |
| Term Start: | May 15, 1930 |
| Term End: | November 18, 1930 |
| Predecessor: | Louis Borno |
| Successor: | Sténio Vincent |
| Birth Date: | 1861 |
| Birth Place: | Haiti |
| Death Date: | October 27, 1939 |
| Death Place: | Port-au-Prince, Haiti |
| Nationality: | Haitian |
Louis Eugène Roy (in French pronounced as /lwi øʒɛn ʁwa/; 1861 – 27 October 1939) was a prominent mulatto[1] Haitian banker selected by U.S. General John H. Russell, Jr., the American High Commissioner to Haïti, to serve as that country's interim president following the resignation of Louis Borno. Roy served from 15 May to 18 November 1930, during which time his major duty was to oversee elections to the new National Assembly. When the Assembly selected Sténio Vincent as president, Roy stepped down.