Monrovia's 2020 population is now estimated at 1,517,235. In 1950, the population of Monrovia was 35,150. Monrovia has grown by 247,403 since 2015, which represents a 3.62% 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 Monrovia, which typically includes Monrovia's population in addition to adjacent suburban areas.
| Year | Population | Growth Rate (%) | Growth |
|---|---|---|---|
| 2035 | 2,491,203 | 3.28% | 371,100 |
| 2030 | 2,120,103 | 3.39% | 325,455 |
| 2025 | 1,794,648 | 3.42% | 277,413 |
| 2020 | 1,517,235 | 3.62% | 247,403 |
| 2015 | 1,269,832 | 3.76% | 213,880 |
| 2010 | 1,055,952 | -2.56% | -146,079 |
| 2005 | 1,202,031 | 7.55% | 366,499 |
| 2000 | 835,532 | 12.48% | 371,530 |
| 1995 | 464,002 | -14.94% | -577,856 |
| 1990 | 1,041,858 | 15.18% | 527,879 |
| 1985 | 513,979 | 9.61% | 189,194 |
| 1980 | 324,785 | 7.51% | 98,623 |
| 1975 | 226,162 | 6.62% | 62,041 |
| 1970 | 164,121 | 6.28% | 43,078 |
| 1965 | 121,043 | 10.03% | 45,986 |
| 1960 | 75,057 | 13.24% | 34,743 |
| 1955 | 40,314 | 2.78% | 5,164 |
| 1950 | 35,150 | 0.00% |