Souillac's 2026 population is now estimated at 4,404. In 2000, the population of Souillac was 4,184. Souillac experienced a decrease of -5 residents over the past year, marking an annual decline of -0.11%. These population values and projections come from Estimated resident population by district, MCA and VCA (Mauritius official open data) and World Population Review Internal Projections .