Rio das Ostras's 2025 population is now estimated at 188,070. In 2010, the population of Rio das Ostras was 105,676. Rio das Ostras has grown by 32,877 in the last year, which represents a 3.92% annual change.
| City | 2025 Pop. ↓ | Growth |
|---|---|---|
| Sao Paulo | 22,990,000 | 0.8% |
| Rio de Janeiro | 13,923,200 | 0.72% |
| Belo Horizonte | 6,351,680 | 0.81% |
| Brasilia | 4,990,930 | 1.13% |
| Recife | 4,344,050 | 0.9% |
| Fortaleza | 4,284,450 | 0.9% |
| Porto Alegre | 4,268,960 | 0.69% |
| Salvador | 4,029,910 | 0.87% |
| Curitiba | 3,889,140 | 0.95% |
| Campinas | 3,491,580 | 0.96% |
| Goiania | 2,927,080 | 1.27% |
| Belem | 2,453,800 | 0.89% |
| Manaus | 2,434,640 | 1.15% |
| Grande Vitoria | 2,220,560 | 1.08% |
| Baixada Santista | 1,981,790 | 0.85% |
| Natal | 1,575,050 | 1.2% |
| Grande Sao Luis | 1,548,210 | 0.79% |
| Joao Pessoa | 1,447,780 | 0.88% |
| Maceio | 1,387,920 | 0.87% |
| Joinville | 1,374,630 | 0.93% |