| Source | UN (World Population Prospects 2019) |
| Date | 23 Aug 2021 |
As of 2021, the population of St Barthelemy is projected at 9.91 thousand, up by 0.24% compared with 9.89 thousand in 2020. St Barthelemy is ranked 228th in terms of population and 182nd in terms of population growth rate.
| Year | Population | Growth (%) |
|---|---|---|
| 1950 | 1,996 | - |
| 1955 | 2,246 | 1.45 |
| 1960 | 2,306 | 0.26 |
| 1965 | 2,384 | 0.34 |
| 1970 | 2,345 | 0.56 |
| 1975 | 2,596 | 3.10 |
| 1980 | 3,085 | 2.25 |
| 1985 | 3,370 | 5.71 |
| 1990 | 5,345 | 7.50 |
| 1995 | 6,365 | 2.94 |
| 2000 | 7,416 | 3.06 |
| 2005 | 8,555 | 2.33 |
| 2010 | 9,234 | 1.31 |
| 2015 | 9,696 | 0.79 |
| 2016 | 9,745 | 0.51 |
| 2017 | 9,788 | 0.44 |
| 2018 | 9,824 | 0.37 |
| 2019 | 9,853 | 0.30 |
| 2020 | 9,885 | 0.32 |
| 2021 | 9,909 | 0.24 |