Sebastopol's 2026 population is now estimated at 5,695. In 2000, the population of Sebastopol was 5,303. Sebastopol has grown by 1 in the last year, which represents a 0.02% annual change. 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 .