When Alphonse Métras was born on 15 February 1843, in Saint-Rémi, Les Jardins-de-Napierville, Quebec, Canada, his father, Pierre Metras, was 33 and his mother, Jeanne Boyer, was 26. He married Domithilde "Mathilde" Lavallée on 4 July 1864, in Lacolle, Saint-Jean, Quebec, Canada. They were the parents of at least 5 sons and 5 daughters. He lived in Hochelaga, Quebec, Canada in 1891 and Laprairie, Quebec, Canada in 1911. He was buried in Sainte-Cecile, Beauharnois, Quebec, Canada.