The population of Tonga is expected to grow by 1,000 in 2019 and reach 111,000 in 2020. Migration (including immigration and emigration) decreases population by 967 people yearly. On average there are 2,558 births and 651 deaths in Tonga per year. Rate of natural increase is approximately 1.73 percent per year. The population density of Tonga has changed from 129.2 in 1980 to 150.0 in 2017.
| Current population | 110,304 people at present (Sunday 21st of April 2019) | |
| Median Age | 27.2 years |
| Life expectancy | 73.4 years | |
| Population density | 152.8 per km2 |
| Year | Population | Year change | Migrants | Median age | Fertility rate | Density (Ppl/km2) | Urban population |
|---|---|---|---|---|---|---|---|
| 2019 | 110,000 | 1,000 (0.9%) | -967 | 27.2 | 3.52 | 153 | 27,000 (24.1%) |
| 2018 | 109,000 | 1,000 (0.9%) | -967 | 27.0 | 3.56 | 151 | 26,000 (24.0%) |
| 2017 | 108,000 | 878 (0.8%) | -967 | 26.9 | 3.60 | 150 | 26,000 (23.9%) |
| 2016 | 107,122 | 758 (0.7%) | -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 2018 the population of Tonga was 109,000 and the average age increased from 22.3 in 1960 to 27.0. Urban population has increased from 22,571 (23.0%) in 2000 to 27,000 (24.1%) in the current year. The population density of Tonga has changed from 129.2 in 1980 to 150.0 in 2017.
| Year | Population | Year change | Migrants | Median age | Fertility rate | Density (Ppl/km2) | Urban population |
|---|---|---|---|---|---|---|---|
| 2020 | 111,000 | 1,000 (0.9%) | -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%) |
Total Tonga population should reach 111,000 by 2020 and should increase to 140,000 people by year 2050. 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 population growth rate is 0.92% (1,000 residents, including 645 deaths). The demographics of Tonga constitutes of 55,000 women and 55,000 men, which means there are 1,000 men per 1000 women. As far as age distribution goes, 45.9% of population (50,501) is 19 or younger, 48.3% of population (53,130) is between age 20 and 64 and 5.8% of population (6,402) is over 65.
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