These tables contain three measures of income inequality among households and individuals: the Gini coefficient, income quintiles, and income deciles.
The Gini coefficient is a measure of inequality in income distribution. It is a number between 0 and 100, where 0 means perfect equality between the members of a group (everyone in the group has the same income), and 100 means perfect inequality (the group’s income is earned by a single member).
Quintiles divide the population into five groups of equivalent demographic weight based on income (lowest income quintile, second quintile, third quintile, fourth quintile, and highest income quintile). Deciles divide the population into ten groups of equivalent demographic weight according to the same principles as quintiles.
These statistics are presented according to three types of income: market income, total income, and after-tax income. They come from various Statistics Canada surveys.
New tables – October 20, 2025
Upper limits of income deciles and distribution of households across deciles, by income type and household type, adjusted for household size, Québec, 2023 (in French only)
Upper limits of income deciles and distribution of households across deciles, by income type and household type, Québec, 2023 (in French only)