Vale Do Aco's 2020 population is now estimated at 521,744. In 1950, the population of Vale Do Aco was 13,046. Vale Do Aco has grown by 23,265 since 2015, which represents a 0.92% annual change. These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Vale Do Aco, which typically includes Vale Do Aco's population in addition to adjacent suburban areas.
| Year | Population | Growth Rate (%) | Growth |
|---|---|---|---|
| 2035 | 576,533 | 0.55% | 15,660 |
| 2030 | 560,873 | 0.70% | 19,208 |
| 2025 | 541,665 | 0.75% | 19,921 |
| 2020 | 521,744 | 0.92% | 23,265 |
| 2015 | 498,479 | 1.03% | 24,988 |
| 2010 | 473,491 | 1.03% | 23,735 |
| 2005 | 449,756 | 1.05% | 22,782 |
| 2000 | 426,974 | 1.71% | 34,769 |
| 1995 | 392,205 | 1.98% | 36,691 |
| 1990 | 355,514 | 2.88% | 46,994 |
| 1985 | 308,520 | 3.08% | 43,440 |
| 1980 | 265,080 | 9.15% | 93,943 |
| 1975 | 171,137 | 9.21% | 60,997 |
| 1970 | 110,140 | 11.26% | 45,526 |
| 1965 | 64,614 | 11.25% | 26,702 |
| 1960 | 37,912 | 11.26% | 15,674 |
| 1955 | 22,238 | 11.26% | 9,192 |
| 1950 | 13,046 | 0.00% |