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Average IQ by Country

Here is a grounded look at country averages from our online dataset. It is useful for comparisons, but it is not a census or a clinical study.

Total tests265,257
Last updated2026-03-02

Quick answer (top and bottom countries)

Top 5 and bottom 5 countries by mean IQ in the current view, with a minimum sample size of 200.

Top 5 averages
  • #1China
    ChinaIQ 106.6
    N: 3,213 | 95% CI: 106.1 to 107.1
  • #2Japan
    JapanIQ 105.5
    N: 5,350 | 95% CI: 105.1 to 105.9
  • #3Hong Kong
    Hong KongIQ 104.5
    N: 731 | 95% CI: 103.4 to 105.6
  • #4South Korea
    South KoreaIQ 103.7
    N: 6,752 | 95% CI: 103.4 to 104
  • #5Australia
    AustraliaIQ 102.8
    N: 212 | 95% CI: 100.5 to 105.1
Bottom 5 averages
  • #1Iraq
    IraqIQ 95.2
    N: 254 | 95% CI: 93.2 to 97.2
  • #2Saudi Arabia
    Saudi ArabiaIQ 95.3
    N: 323 | 95% CI: 93.8 to 96.8
  • #3Egypt
    EgyptIQ 95.4
    N: 574 | 95% CI: 94.2 to 96.6
  • #4Ukraine
    UkraineIQ 96.8
    N: 20,368 | 95% CI: 96.6 to 97
  • #5Thailand
    ThailandIQ 97.9
    N: 1,338 | 95% CI: 97.1 to 98.7
Takeaways
  • China currently sits near the top with N=3,213 in the Validated view.
  • Across countries, the mean range spans about 11.4 IQ points in this view.
  • Care matters: leaders like China invest about 50% more time than average. Time alone is not a guarantee of success (see Saudi Arabia).
Validated N
83,579 / 265,257
Validation rate 31.5%
View
Current view N: 83,579

IQ map by country

Click a country to jump to its row. Use search to focus on a specific country.

Tip: click a country to jump to its row in the table.
Lower IQ
Higher IQ
Gray indicates no data in the current view.

Country rankings (mean IQ, CI, N)

Full sortable rankings with mean, CI, sample sizes, and validation rate.

Average IQ by Country
95% CI
1ChinaChina106.6106.1 to 107.13,2133,21332.7%52:322026-03-02
2JapanJapan105.5105.1 to 105.95,3505,35040.8%43:502026-03-01
3Hong KongHong Kong104.5103.4 to 105.673173136.5%44:272026-03-02
4South KoreaSouth Korea103.7103.4 to 1046,7526,75231.1%37:482026-03-02
5AustraliaAustralia102.8100.5 to 105.121221237.5%43:242026-02-26
6TaiwanTaiwan102.7102 to 103.41,7501,75035.7%43:082026-03-01
7ItalyItaly101.6100.6 to 102.694994929.4%41:182026-03-02
8United States of AmericaUnited States of America101.5100.7 to 102.31,3971,39736.0%47:072026-03-02
9FranceFrance101.2100.3 to 102.11,0081,00838.0%39:532026-03-02
10BelarusBelarus101.1100 to 102.263163136.5%40:232026-03-02
11CanadaCanada101.199.6 to 102.645045040.0%42:272026-03-02
12SwitzerlandSwitzerland101.199.6 to 102.633933935.4%41:472026-03-01
13NetherlandsNetherlands101.1100.1 to 102.11,0391,03937.7%40:462026-03-02
14IndonesiaIndonesia10198.7 to 103.322122120.8%35:422026-02-25
15AustriaAustria100.999.5 to 102.345645642.7%37:102026-03-02
16BelgiumBelgium100.999.2 to 102.628528545.6%37:182026-02-27
17SwedenSweden100.999.4 to 102.440340334.3%51:452026-03-02
18FinlandFinland100.899.6 to 10264964933.6%48:172026-02-28
19GermanyGermany100.7100.3 to 101.14,1104,11043.7%43:522026-03-02
20United KingdomUnited Kingdom100.399.2 to 101.460260237.3%41:062026-03-02
21GreeceGreece100.198.7 to 101.547047030.1%40:562026-03-02
22SpainSpain99.998.4 to 101.438438435.1%41:412026-03-02
23DenmarkDenmark99.898.1 to 101.536636636.6%37:272026-03-01
24RussiaRussia99.899.6 to 10012,87712,87731.4%40:032026-03-02
25HungaryHungary99.698.5 to 100.769969932.5%36:352026-03-01
26NorwayNorway99.397.6 to 10133433435.5%40:372026-03-02
27Czech RepublicCzech Republic99.298.3 to 100.194694640.3%38:002026-02-28
28EstoniaEstonia9997.6 to 100.430330339.1%40:252026-02-28
29BrazilBrazil98.796.9 to 100.538738728.5%45:572026-03-01
30KazakhstanKazakhstan98.797.8 to 99.689589528.9%43:452026-03-02
31SlovakiaSlovakia98.597.8 to 99.21,2791,27935.4%37:182026-03-02
32UzbekistanUzbekistan98.596.9 to 100.137237217.8%40:502026-02-28
33PolandPoland98.497.7 to 99.11,8531,85335.7%36:032026-03-02
34RomaniaRomania98.397.3 to 99.384384329.1%43:512026-03-01
35TurkeyTurkey98.397.8 to 98.83,1123,11225.0%38:072026-03-02
36AlgeriaAlgeria98.296.6 to 99.831331323.5%36:462026-03-01
37BulgariaBulgaria9896.9 to 99.161861835.7%36:542026-03-02
38ThailandThailand97.997.1 to 98.71,3381,33817.4%34:342026-02-28
39UkraineUkraine96.896.6 to 9720,36820,36833.2%35:162026-03-02
40EgyptEgypt95.494.2 to 96.657457423.9%35:322026-02-20
41Saudi ArabiaSaudi Arabia95.393.8 to 96.832332326.7%52:332026-03-01
42IraqIraq95.293.2 to 97.225425422.7%38:052026-03-02
Showing 42 countries.

Compare countries

Compare mean, CI, N, distribution range, time, and validation rate in the current view.

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Sample size by country (N)

Bars are stacked (validated + unvalidated). Showing the top 40 by all-results N.

Why sample size matters

The statistical stability of a mean depends directly on sample size (N). Countries like Ukraine (N=61,385) and Russia (N=41,006) usually yield tighter confidence intervals, while smaller samples can swing more between updates. We intentionally show both validated and unvalidated results for full transparency of the data basis.

Validation rate by country

Validated vs all results, plus the validation rate by country.

Quality assurance: validated vs all results

The validation rate shows how many tests passed our quality checks (for example duplicate attempts, bot-like activity, or incomplete sessions).

  • High data quality: In the current view, Germany (43.7%) and Austria (42.7%) are among the strongest validation rates.
  • Transparency: The gap between the bars shows how much raw traffic we filter out. In total we exclude 181,678 records (68.5%) to protect the statistical core of the IQ mean.

Why this matters: "All Results" captures broad reach, while "Validated" is the cleaner core for robust country comparisons.

IQ distribution by country (p10-p90)

Shows the middle 80% (p10 to p90) and the middle half (p25 to p75). Select up to 5.

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Select up to 5 (0/5)
85100115
IQ score

Average time taken by country

Average time taken for the top countries by N in the current view.

Expert note

💡 The paradox of completion time

Our analysis shows that in Raven-style matrix reasoning, time can play two different roles:

  • 🧠Efficient depth: Countries like China and Japan combine very high completion times (43.8-52.5 Min.) with top scores. On complex matrices, this points to the mental stamina needed to solve difficult rules systematically.
  • ⚠️Compensatory time: Using Saudi Arabia as an example (52.6 Min. at IQ 95.3), we see that time alone is not a guarantee of success. Longer duration can also reflect limited test routine, language friction in instructions, or technical constraints.

Conclusion: Higher time investment is often a prerequisite for top scores, but it can also reflect cultural differences in how people approach non-verbal tests.

How to interpret country differences

  • Selection effects: who chooses to take an online test differs by country.
  • Language and device comfort can shift results on timed tasks.
  • Test familiarity and pacing vary across regions and cultures.
  • Repeat attempts, VPN usage, and access patterns can affect averages.
  • Differences are usually small and groups overlap a lot - do not over-interpret rank order.

Method and data notes

  • Country is self-reported and not independently verified.
  • Results are from an online, self-selected dataset - not population norms.
  • This does not mean a country causes higher IQ.
  • Scores start as percentiles, then we rescale them to 100 +/- 15.
  • If you only look at rank order, you will overread tiny differences - check CI and N.

See methodology and limits for the dataset.

Download, cite, and embed

Download CSV of country aggregates
Includes the current view (Validated).
Citation
UniversalIQTest.com. Average IQ by Country (accessed 2026-03-03). https://www.universaliqtest.com/statistics/average-iq-by-country
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FAQ

Average IQ in the US?

Use the table or compare tool to see the current mean, CI, and sample size.

Why is Country X high in your rankings?

This dataset is self-selected and online. Differences can reflect selection, language, device, and pacing rather than population differences.

Is this scientific or representative?

No. These are online test results summarized as dataset statistics, not population norms.

Does this mean a country causes higher IQ?

No. This page shows associations in our dataset and should not be read as causal.

How do you validate results?

Validated results pass quality checks; all results include unvalidated submissions.

Last updated

Data last updated: 2026-03-02 (latest test submission).
Page refreshed: 2026-03-03 11:45 UTC (site build time).

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