The objective of this report is to study wealth inequality and cohort differences in wealth in Québec and Ontario for the period 1999-2019. Based on data from Statistics Canada's Survey of Financial Security, it compares household wealth and its distribution across the two provinces, highlights the role of various demographic groups and asset types, and analyzes the evolution of wealth accumulation by age over time. The main findings show that household wealth in Québec was lower than in Ontario as early as 1999, a disparity that has since widened. This gap does not appear to be attributable to differences in household growth, data sources, income growth, educational dynamics, or income shares held by the wealthiest. Instead, the analyses suggest that the primary factor lies in divergent trends in real estate wealth.