 The region is dived into eight Regional county municipalities (RCM), which contain 130 municipalities.Bas Saint-Laurent contained 200,462 inhabitants in 2011, of which 55,400 were in its most populous RCM, Rimouski-Neigette.Otherwise, the least populous RCM of the region is Les Basques, with only 9,000 inhabitants in 2011, a number which decreased by 1,300 since 1996, making it also the RCM with the highest annual rate of population decrease of the region, with a rate of 9.6% between 2006 and 2011.