Cilaos's 2026 population is now estimated at 4,928. In 1982, the population of Cilaos was 5,735. Cilaos experienced a decrease of -37 residents over the past year, marking an annual decline of -0.75%. These population values and projections come from Reunion commune census series 1982-1999 via CityPopulation INSEE attribution, Reunion commune estimate series 2007-2023 via CityPopulation INSEE attribution and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Saint-Denis | 159,007 | 0.72% |
| Saint-Paul | 108,894 | 0.25% |
| Saint-Pierre | 85,407 | 0.14% |
| Le Tampon | 85,060 | 0.99% |
| Saint-Andre | 60,114 | 0.69% |
| Saint-Louis | 55,482 | 0.33% |
| Saint-Joseph | 39,824 | 0.52% |
| Saint-Benoit | 38,856 | 0.22% |
| Sainte-Marie | 38,782 | 1.49% |
| La Possession | 38,125 | 1.4% |
| Saint-Leu | 37,132 | 0.89% |
| Le Port | 33,490 | -0.47% |
| Sainte-Suzanne | 26,550 | 1.29% |
| L'Etang-Sale | 14,515 | 0.12% |
| Petite-Ile | 13,431 | 0.92% |
| Bras-Panon | 13,117 | 0.27% |
| Les Avirons | 11,685 | 0.43% |
| Entre-Deux | 7,330 | 0.71% |
| Les Trois-Bassins | 7,257 | 0.17% |
| La Plaine-des-Palmistes | 7,253 | 1.5% |
| Salazie | 7,225 | -0.19% |
| Sainte-Rose | 6,533 | -0.12% |
| Saint-Philippe | 5,070 | -0.08% |
| Cilaos | 4,928 | -0.75% |
