| Birth* | Joseph Gagnon was born on 16 February 1709 at Ste Famille-IO, Montmorency, Québec, Canada. |
| He was the son of Joseph Gagnon and Marie Cloutier. |
| Christening | Joseph Gagnon was christened on 17 February 1709 at Ste Famille-IO, Montmorency, Québec, Canada. |
| Marriage* | He married Josephte Pepin, daughter of Antoine Pepin and Rose Lepage, on 24 November 1732 at St Francois-IO, Montmorency, Québec, Canada. |
| Marriage License | Joseph Gagnon and Josephte Pepin obtained a marriage license. |
| Engagement | Joseph Gagnon and Josephte Pepin were engaged. |
| Death* | Joseph Gagnon died after 1753 at Québec, Canada. |
| Burial* | He was buried after 1753 at Québec, Canada. |
