 In 2011, the average age of the population of Bas-Saint-Laurent was 47.3 years, making it the second oldest province of Quebec by that criteria, behind neighboring Gaspésie–Îles-de-la-Madeleine (49.0 years) and just before the region in third place, Mauricie (47.2).The share of youths under the age of 20 is also one of the lowest of Quebec, at 19.5%, compared to the average of 21.7%.As is the case for data on population, the data on the age of said population shows a clear divide between the two urban RCMs and the rural ones.