Gros Caillou's 2026 population is now estimated at 4,046. In 2000, the population of Gros Caillou was 2,930. Gros Caillou has grown by 59 in the last year, which represents a 1.48% 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 .