This document presents a demographic analysis of the Levasseur family based on data from the Canadian census of 1931. He points out that the vast majority of members of this lineage lived in Quebec, particularly in the Trois-Rivières and Matane regions. The sources explain how to access these digitized archives via Library and Archives Canada while specifying the challenges related to the readability of ancient manuscripts. In addition to provincial statistics, the book illustrates the historical evolution of the Levasseur population since the mid-19th century. This initiative of the family association aims to encourage genealogical research and the preservation of their collective heritage.