Mario Dion
| Mario Dion | |
|---|---|
| 2nd Conflict of Interest and Ethics Commissioner of Canada | |
| In office January 9, 2018 – February 21, 2023 | |
| Preceded by | Mary Dawson | 
| Succeeded by | Martine Richard (interim) | 
| 2nd Public Sector Integrity Commissioner | |
| In office 2011–2014 | |
| Preceded by | Christiane Ouimet | 
| Succeeded by | Joe Friday | 
| Personal details | |
| Born | 1956 Montreal, Quebec, Canada | 
| Occupation | Civil servant, lawyer | 
Mario Dion (born c. 1956) is a Canadian public servant who served as the second conflict of interest and ethics commissioner of Canada. He was appointed on January 9, 2018, succeeding Mary Dawson to a seven-year term. In February 2023, he resigned due to persistent health issues.