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Solomon Islands vs Tonga
Side-by-side comparison of Solomon Islands and Tonga from official statistics: size, economy, people, trade, natural resources, health, infrastructure and military, with world ranks, years and sources.
Solomon Islands
East Asia & Pacific · nation age 48 years
In short
Tonga scores 48.9 in the NationsTree Index (93rd in the world) and Solomon Islands scores 32.6 (155th), a gap of 16.3 points. Their trees are 0.8 m and 0.6 m tall; tree height grows with real GDP and is adjusted by the index.
Solomon Islands has 8.1 times the population of Tonga. Solomon Islands is 38 times larger than Tonga by land area. Solomon Islands has an economy 2.6 times the size of Tonga (GDP at purchasing power parity). Population: Solomon Islands 838,645 and Tonga 103,742 (2025).
GDP per person at purchasing power parity is $8,675 in Tonga and $2,788 in Solomon Islands (2025, international dollars). People in Tonga live on average 2.4 years longer (73.1 vs 70.7 years).
Of 26 indicators reported by both countries, Solomon Islands ranks higher in the world on 7 and Tonga on 19. Solomon Islands is clearly stronger in environment & energy, trade and main industries. Tonga is clearly stronger in society & health, tourism and infrastructure & digital.
As a nation, Tonga is the older of the two (statehood since 1970, 56 years), compared with Solomon Islands (since 1978). Over the last five years Tonga improved faster (direction score 86 vs 30 out of 100).
Where they differ most
The indicators with the biggest gap in world position between Solomon Islands and Tonga.
Solomon Islands
81.5%
169th of 215
Tongabetter
100.0%
1st of 215
DPT immunizationSociety & health
Solomon Islands
87%
121st of 193
Tongabetter
99%
1st of 193
Renewable energyEnvironment & energy
Solomon Islandsbetter
50.1%
49th of 212
Tonga
2.3%
178th of 212
Government budget balanceEconomy
Solomon Islands
-3.9%
129th of 192
Tongabetter
1.2%
27th of 192
Fixed broadbandInfrastructure & digital
Solomon Islands
0.1
194th of 208
Tongabetter
8.2
124th of 208
Over time
How the two countries moved against each other, from the yearly data.
Tonga has been ahead of Solomon Islands in the NationsTree Index in every year since 1996.
Tonga has been ahead of Solomon Islands in GDP per person (PPP) and life expectancy in every year since 1990.
Solomon Islands has been ahead of Tonga in GDP (PPP) and population in every year since 1990.
Strength by category
Average world percentile of the indicators in each category (0–100, direction taken into account). i
Solomon IslandsTonga All indicators
Latest available value for each country with its year and world rank. Green: the better world position of the two, red: the weaker one.
| Indicator | Solomon Islands | Tonga |
|---|---|---|
| Land & people | ||
| Surface area km² | 28,446141st/216 · 2024 | 749183rd/216 · 2024 |
| Land area km² | 27,990141st/216 · 2024 | 720183rd/216 · 2024 |
| Population people | 838,645163rd/217 · 2025 | 103,742193rd/217 · 2025 |
| Population growth % | 2.35%32nd/217 · 2025 | -0.42%195th/217 · 2025 |
| Population density people/km² | 29.3174th/216 · 2024 | 144.781st/216 · 2024 |
| Urban population % | 31.3%194th/217 · 2025 | 21.2%211th/217 · 2025 |
| Population aged 0–14 % | 36.6%45th/217 · 2025 | 34.9%52nd/217 · 2025 |
| Population aged 65+ % | 3.7%174th/217 · 2025 | 6.9%127th/217 · 2025 |
| Economy | ||
| GDP USD | $1.75 bn192nd/210 · 2025 | $679.2 m203rd/210 · 2025 |
| GDP (PPP) intl. USD | $2.34 bn185th/199 · 2025 | $899.9 m193rd/199 · 2025 |
| Real GDP (PPP, constant 2021 prices) intl. USD 2021 | $2.00 bn185th/199 · 2025 | $769.0 m193rd/199 · 2025 |
| GDP per person USD | $2,086174th/210 · 2025 | $6,547126th/210 · 2025 |
| GDP per person (PPP) intl. USD | $2,788188th/199 · 2025 | $8,675146th/199 · 2025 |
| GNI per person (Atlas) USD | $2,020165th/201 · 2025 | $6,840112th/201 · 2025 |
| GDP growth % | 3.6%93rd/210 · 2025 | 2.8%123rd/210 · 2025 |
| Inflation % | 3.4%99th/180 · 2025 | 5.6%142nd/180 · 2025 |
| Unemployment % | 1.4%9th/187 · 2025 | 2.0%17th/187 · 2025 |
| Central government debt % of GDP | 26.0%9th/55 · 2024 | 43.1%19th/55 · 2020 |
| General government gross debt % of GDP | 29.6%32nd/189 · 2025 | 26.9%27th/189 · 2025 |
| Government budget balance % of GDP | -3.9%129th/192 · 2025 | 1.2%27th/192 · 2025 |
| Main industries | ||
| Agriculture, forestry, fishing % of GDP | 29.7%13th/197 · 2024 | 18.6%40th/197 · 2024 |
| Industry incl. construction % of GDP | 23.4%102nd/200 · 2024 | 17.7%144th/200 · 2024 |
| Manufacturing % of GDP | 10.1%97th/192 · 2024 | 5.5%146th/192 · 2024 |
| Services % of GDP | 46.9%161st/200 · 2024 | 49.5%147th/200 · 2024 |
| Trade | ||
| Exports of goods & services USD | $642.6 m164th/182 · 2024 | $109.4 m179th/182 · 2024 |
| Imports of goods & services USD | $1.12 bn167th/182 · 2024 | $392.9 m176th/182 · 2024 |
| Exports % of GDP | 40.6%79th/183 · 2024 | 16.9%155th/183 · 2024 |
| Imports % of GDP | 70.8%33rd/183 · 2024 | 60.7%55th/183 · 2024 |
| Trade openness % of GDP | 111.4%48th/183 · 2024 | 77.6%101st/183 · 2024 |
| Fuel exports % of merchandise exports | 0.0%2017 | 0.0%156th/170 · 2025 |
| Manufactures exports % of merchandise exports | 2.2%2018 | 84.2%13th/171 · 2025 |
| Food exports % of merchandise exports | 20.1%2018 | 15.0%91st/171 · 2025 |
| Ores & metals exports % of merchandise exports | 3.8%2018 | 0.7%141st/171 · 2025 |
| High-tech exports % of manufactured exports | 1.4%2018 | 28.5%18th/168 · 2023 |
| Current account balance % of GDP | 5.6%33rd/191 · 2025 | -4.3%135th/191 · 2025 |
| Foreign direct investment, inflows % of GDP | 3.8%56th/196 · 2025 | 2.6%78th/196 · 2025 |
| Natural resources | ||
| Natural resource rents % of GDP | 18.4%28th/209 · 2021 | 0.0%166th/209 · 2021 |
| Oil rents % of GDP | 0.00%120th/197 · 2021 | 0.00%120th/197 · 2021 |
| Natural gas rents % of GDP | 0.00%100th/197 · 2021 | 0.00%100th/197 · 2021 |
| Coal rents % of GDP | 0.00%68th/195 · 2021 | 0.00%68th/195 · 2021 |
| Mineral rents % of GDP | 0.00%91st/209 · 2021 | 0.00%91st/209 · 2021 |
| Forest rents % of GDP | 18.40%1st/209 · 2021 | 0.04%131st/209 · 2021 |
| Arable land % of land area | 0.8%185th/206 · 2024 | 30.3%28th/206 · 2024 |
| Renewable freshwater per person m³ | 57,22910th/183 · 2022 | — |
| Tourism | ||
| International tourist arrivals arrivals | 4,400192nd/194 · 2020 | 94,000164th/194 · 2019 |
| Tourism receipts USD | $7.0 m170th/175 · 2020 | $47.7 m157th/175 · 2020 |
| Tourism receipts % of exports | 1.6%137th/168 · 2020 | 47.8%16th/168 · 2020 |
| Society & health | ||
| Life expectancy years | 70.7149th/217 · 2024 | 73.1124th/217 · 2024 |
| Under-5 mortality per 1,000 births | 20.0123rd/196 · 2024 | 9.570th/196 · 2024 |
| Physicians per 1,000 people | 0.24140th/174 · 2023 | 1.01105th/174 · 2021 |
| Hospital beds per 1,000 people | 2.71992 | 2.52010 |
| DPT immunization % of children 12–23 months | 87%121st/193 · 2024 | 99%1st/193 · 2024 |
| Completed lower secondary, 25+ % of adults | 34.1%2015 | 94.2%32nd/153 · 2021 |
| Secondary enrolment % gross | 49.0%2012 | 92.4%90th/173 · 2024 |
| Social protection coverage (incl. pensions) % of population | 1.7%2005 | — |
| Old-age dependency ratio % of working-age population | 6.1%177th/217 · 2025 | 11.8%117th/217 · 2025 |
| Health spending % of GDP | 5.4%122nd/193 · 2023 | 7.4%78th/193 · 2023 |
| Adult literacy % | 76.6%1999 | 99.5%11th/98 · 2023 |
| Tertiary enrolment % gross | — | 42.9%91st/150 · 2023 |
| Human Development Index index 0–1 | 0.584156th/193 · 2023 | 0.76992nd/193 · 2023 |
| Income inequality (Gini) index | 37.12012 | 27.111th/108 · 2021 |
| Extreme poverty % of population | 40.3%2012 | 0.4%27th/108 · 2021 |
| Infrastructure & digital | ||
| Access to electricity % of population | 81.5%169th/215 · 2024 | 100.0%1st/215 · 2024 |
| Safely managed drinking water % of population | — | 29.6%131st/150 · 2024 |
| Safely managed sanitation % of population | — | 31.2%109th/144 · 2024 |
| Internet users % of population | 29.0%170th/186 · 2024 | 67.4%128th/186 · 2024 |
| Mobile subscriptions per 100 people | 62191st/210 · 2022 | 62192nd/210 · 2022 |
| Fixed broadband per 100 people | 0.1194th/208 · 2022 | 8.2124th/208 · 2022 |
| Trade & transport infrastructure quality (LPI) score 1–5 | 2.6080th/164 · 2022 | — |
| Air passengers carried passengers | 157,418131st/161 · 2023 | 75,4162004 |
| Environment & energy | ||
| CO₂ emissions per person t CO₂e | 0.3837th/203 · 2024 | 1.6381st/203 · 2024 |
| Renewable energy % of final energy use | 50.1%49th/212 · 2022 | 2.3%178th/212 · 2022 |
| Air pollution (PM2.5) µg/m³ | 9.844th/200 · 2023 | 4.711th/200 · 2023 |
| Forest area % of land area | 89.8%5th/214 · 2024 | 12.1%155th/214 · 2024 |
| Energy use per person kg oil eq. | 1282007 | 5432007 |
| Institutions & safety | ||
| Government effectiveness score 0–100 | 35.0170th/205 · 2025 | 51.1112th/205 · 2025 |
| Control of corruption score 0–100 | 44.9101st/207 · 2025 | 39.6127th/207 · 2025 |
| Rule of law score 0–100 | 61.692nd/207 · 2025 | 71.448th/207 · 2025 |
| Political stability score 0–100 | 78.763rd/207 · 2025 | 88.614th/207 · 2025 |
| Regulatory quality score 0–100 | 39.1176th/205 · 2025 | 51.1116th/205 · 2025 |
| Voice & accountability score 0–100 | 69.161st/205 · 2025 | 72.553rd/205 · 2025 |
| Homicide rate per 100,000 | 3.72008 | 0.940th/145 · 2019 |
| Military | ||
| Arms imports (SIPRI TIV) TIV | 7.0 m117th/163 · 2021 | 7.0 m2020 |
| Science & innovation | ||
| Patent applications by residents applications | — | 5117th/137 · 2024 |
| Scientific articles articles | 15180th/197 · 2023 | 5187th/197 · 2023 |
Questions and answers
Which has more people, Solomon Islands or Tonga?
Solomon Islands has the larger population: 838,645 (2025) compared with 103,742 for Tonga (2025). Source: World Bank, SP.POP.TOTL.
Which is bigger by area, Solomon Islands or Tonga?
Solomon Islands is larger: 28,446 km² (2024) compared with 749 km² for Tonga (2024). Source: World Bank, AG.SRF.TOTL.K2.
Which economy is larger, Solomon Islands or Tonga?
Solomon Islands has the larger economy at purchasing power parity: $2.34 bn intl. (2025) compared with $899.9 m intl. for Tonga (2025). Source: World Bank, NY.GDP.MKTP.PP.CD.
Which is richer per person, Solomon Islands or Tonga?
Tonga has the higher GDP per person (PPP): $8,675 intl. (2025) compared with $2,788 intl. for Solomon Islands (2025). Source: World Bank, NY.GDP.PCAP.PP.CD.
Where do people live longer, in Solomon Islands or Tonga?
Tonga has the higher life expectancy at birth: 73.1 years (2024) compared with 70.7 years for Solomon Islands (2024). Source: World Bank, SP.DYN.LE00.IN.
Which ranks higher in the NationsTree Index, Solomon Islands or Tonga?
Tonga: 48.9 points (93rd in the world); Solomon Islands: 32.6 points (155th). The index combines foundations, economic strength, quality of life, problems and 5-year direction from public statistics.
Samoa
Timor-Leste
Vanuatu
Kiribati
Micronesia
PalauSources
World Bank World Development Indicators and Worldwide Governance Indicators, compiling UN agencies, the IMF, WHO, SIPRI and national statistical offices; every row links to its world ranking with the source series. See Sources & licences and Methodology.
Cite as: NationsTree (2026). Solomon Islands vs Tonga — country comparison. https://nationstree.org/compare/solomon-islands-vs-tonga. Data as of 26 October 2026.