The population of Tonga is expected to grow by 1,000 in 2025 and reach 117,000 in 2026. Migration (including immigration and emigration) decreases population by 976 people yearly. On average there are 2,653 births and 675 deaths in Tonga per year. Rate of natural increase is approximately 1.71 percent per year. The population density of Tonga has changed from 129.2 in 1980 to 158.1 in 2023.
| Current population | 116,529 people at present (Saturday 12th of July 2025) | |
| Median Age | 28.1 years |
| Life expectancy | 74.2 years | |
| Population density | 160.8 per km2 |
| Year | Population | Year change | Migrants | Median age | Fertility rate | Density (Ppl/km2) | Urban population |
|---|---|---|---|---|---|---|---|
| 2025 | 116,000 | 1,000 (0.9%) | -976 | 28.1 | 3.30 | 161 | 29,000 (25.0%) |
| 2024 | 115,000 | 1,000 (0.9%) | -976 | 28.0 | 160 | 29,000 (24.8%) | |
| 2023 | 114,000 | 1,000 (0.9%) | -976 | 27.9 | 158 | 28,000 (24.7%) | |
| 2022 | 113,000 | 1,000 (0.9%) | -976 | 27.7 | 157 | 28,000 (24.5%) | |
| 2021 | 112,000 | 1,000 (0.9%) | -976 | 27.5 | 156 | 27,000 (24.4%) | |
| 2020 | 111,000 | 1,000 (0.9%) | -976 | 27.3 | 3.48 | 154 | 27,000 (24.2%) |
| 2019 | 0 | 0 (0.0%) | -967 | 27.2 | 3.52 | 153 | 27,000 (24.1%) |
| 2018 | 0 | 0 (0.0%) | -967 | 27.0 | 3.56 | 151 | 26,000 (24.0%) |
| 2017 | 0 | 0 (0.0%) | -967 | 26.9 | 3.60 | 150 | 26,000 (23.9%) |
| 2016 | 0 | 0 (0.0%) | -967 | 26.8 | 3.64 | 149 | 25,496 (23.8%) |
| 2015 | 106,364 | 582 (0.6%) | -967 | 26.6 | 3.68 | 148 | 25,221 (23.7%) |
| 2010 | 104,137 | 533 (0.5%) | -1,616 | 26.2 | 3.91 | 145 | 24,357 (23.4%) |
| 2005 | 101,041 | 635 (0.6%) | -1,639 | 25.9 | 4.14 | 140 | 23,396 (23.2%) |
| 2000 | 98,082 | 491 (0.5%) | -1,626 | 25.3 | 4.25 | 136 | 22,571 (23.0%) |
| 1995 | 96,076 | 243 (0.3%) | -1,740 | 25.0 | 4.45 | 133 | 21,967 (22.9%) |
| 1990 | 95,153 | 224 (0.2%) | -2,216 | 24.1 | 4.64 | 132 | 21,604 (22.7%) |
| 1985 | 93,953 | 111 (0.1%) | -2,180 | 23.3 | 5.13 | 130 | 20,921 (22.3%) |
| 1980 | 93,007 | 707 (0.8%) | -2,508 | 23.6 | 5.55 | 129 | 19,675 (21.2%) |
| 1975 | 88,348 | 739 (0.8%) | -1,578 | 22.5 | 5.43 | 123 | 17,967 (20.3%) |
| 1970 | 84,369 | 1,492 (1.8%) | -1,527 | 21.4 | 5.94 | 117 | 17,032 (20.2%) |
| 1965 | 74,362 | 2,605 (3.5%) | -629 | 21.8 | 6.97 | 103 | 14,500 (19.5%) |
| 1960 | 61,601 | 2,144 (3.4%) | 21 | 22.3 | 7.36 | 86 | 10,812 (17.6%) |
In 2024 the population of Tonga was 115,000 and the average age increased from 22.3 in 1960 to 28.0. Urban population has increased from 22,571 (23.0%) in 2000 to 29,000 (25.0%) in the current year. The population density of Tonga has changed from 129.2 in 1980 to 158.1 in 2023.
| Year | Population | Year change | Migrants | Median age | Fertility rate | Density (Ppl/km2) | Urban population |
|---|---|---|---|---|---|---|---|
| 2020 | 0 | 0 (0.0%) | -976 | 27.3 | 3.48 | 154 | 27,000 (24.2%) |
| 2025 | 116,000 | 1,000 (0.9%) | -976 | 28.1 | 3.30 | 161 | 29,000 (25.0%) |
| 2030 | 121,000 | 1,000 (0.8%) | -974 | 28.8 | 3.15 | 168 | 31,000 (26.0%) |
| 2035 | 127,000 | 2,000 (1.6%) | -974 | 29.4 | 3.01 | 176 | 34,000 (27.2%) |
| 2040 | 132,000 | 1,000 (0.8%) | -973 | 30.2 | 2.88 | 183 | 38,000 (28.7%) |
| 2045 | 136,000 | 0 (0.0%) | -973 | 31.0 | 2.77 | 189 | 41,000 (30.3%) |
| 2050 | 140,000 | 1,000 (0.7%) | -973 | 32.0 | 2.67 | 194 | 45,000 (31.9%) |
The life expectancy at birth should reach 77.8 (75.0 years for male and 80.6 years for females). Population density will go up to 194.3 people per square kilometer.
The demographics of Tonga constitutes of 58,000 women and 58,000 men, which means there are 1,000 men per 1000 women. As far as age distribution goes, 43.0% of population (49,903) is 19 or younger, 50.1% of population (58,104) is between age 20 and 64 and 6.7% of population (7,807) is over 65.