| Birth* | Jean Gagnon was born on 16 September 1707 at La Visitation de Nôtre-Dame, Château-Richer, Montmorency, Québec, Canada. |
| Christening | He was christened on 17 September 1707 at La Visitation de Nôtre-Dame, Montmorency, Québec, Canada. |
| Marriage* | He married Marie-Jeanne Marceau on 30 January 1731 at St Francois-IO, Montmorency, Québec, Canada. |
| Death* | Jean Gagnon died before 4 September 1779 at St Francois-IO, Montmorency, Québec, Canada. |
| Burial* | He was buried on 4 September 1779 at St Francois-IO, Montmorency, Québec, Canada. |
