Average IQ in the USA: 98, State Rankings and Global Context

Ask most people what the average IQ in the USA is and you’ll get a confident guess, not a sourced number. The number that shows up most often in data roundups is 98 — about two points below the global baseline of 100 most IQ tests use as their reference point. That 98 hides a bigger story: state averages swing by more than ten points, and much of the data behind them is recycled rather than freshly measured.

Average IQ in the USA: 98 · Global average IQ baseline: 100 · IQ range covering 83.9% of Americans: 85–145 · Highest state average IQ (Massachusetts): 104.3

Ten numbers frame the national picture — and one pattern: the swing between states is several times larger than the country’s two-point gap from the global baseline (Asbury Park Press (New Jersey news outlet)).

What is the average IQ in the world?

The short, heavily caveated answer: the world average is usually given as 100, but that number is a test-norming convention, not a measured global census. IQGO’s 2024 world-ranking page is widely referenced online, yet the data behind it is assembled from test-taking groups rather than official statistics (IQGO (online testing platform)).

What is the average IQ in Asia?

• There is no authoritative continental average for Asia — the region spans dozens of testing populations with different languages, schooling systems, and norming samples.
• Country-level pages publish their own numbers, but those numbers are compiled estimates from self-selected test takers, not government statistics.
• Because the pages are updated by different sites at different times, an “Asia average” quoted from one source usually disagrees with the next one.

How does the USA compare to the world average?

USA: 98 · Global baseline: 100 · Difference: 2 points

The two-point gap is small enough to be noise in some estimates and meaningful in others. What the comparison actually shows: the USA sits inside the developed-country cluster, not at the top of it, and not far below the middle.

The more important comparison is inside the country: states swing from 104.3 down to 94.2, a range several times larger than the national gap from the global baseline.

The pattern is clear: the global baseline is a convention, not a measurement, and the USA’s position is best understood through state-level variation.

What is the average IQ in Europe?

European averages cluster around 100 in most online country rankings, with the same caveat attached: these tables are maintained by non-government testing sites and revised frequently, not by a central statistical office (International IQ Test (testing site)).

How does Europe compare to the USA?

• European country averages generally sit around 100 in aggregator tables.
• Several Northern European countries appear near the top of those tables, though the gaps between countries are small.
• The USA’s 98 places it just below the typical European cluster — closer to Europe’s middle than to its top.

The implication: the “USA versus Europe” debate is really about a two-point gap — smaller than the difference between Massachusetts and Mississippi. The regional comparison flatters no one; the state comparison explains more.

What is the average IQ in the USA for adults?

For adults, the most-cited figure is the same 98 that appears in country-ranking pages. The confusion starts when that 98 meets the 100 that adult IQ tests use as their norm.

What is the average IQ for American adults?

• Adult IQ tests are normed so their standardization sample averages 100; your score is compared with same-age peers, not with the whole country.
• The 98 is an aggregated estimate, not the result of one federal test of American adults.
• Peer-reviewed researchers maintain their own state-level estimates, which use different methods than the syndicated news numbers (PMC (NIH research archive)).

What this means: the adult figure worth trusting is the one attached to a named dataset. A round 100 and a clean 98 both hide the same reality — every number is sample-dependent.

What is the average IQ in the USA by age?

The honest answer: there is no authoritative public table of average IQ by age for the USA. Numbers that circulate online come from test-company norming samples, and they shift depending on the test and the sample used.

Does IQ change with age?

• Group averages typically rise through young adulthood, plateau in the middle years, and decline gradually in older cohorts.
• That curve describes averages, not individuals — a person’s relative standing is far more stable than the group pattern suggests.

What is the average IQ for children versus adults?

• Children’s IQ scores are age-adjusted, so a 10-year-old is compared with other 10-year-olds, not with adults. That is why the average for each childhood age sits near 100 within a test’s own norming sample.
• The national 98 is a population-level estimate; it is not a target score for any specific age group.

The catch: precise “IQ by age” breakdowns sound scientific, but no central source publishes them for the USA. Treat exact numbers as directional, not definitive.

What is the highest IQ in the USA?

The highest average IQ in the USA belongs to a state, not a person. Massachusetts leads with 104.3, and the figure repeats across multiple rankings because they recycle the same data.

Which US state has the highest average IQ?

• Massachusetts sits at 104.3, with New Hampshire close behind at 104.2 (Zippia (career data company)).
• The same pair of states appears in Katie Couric Media’s 2023 ranking and in the Asbury Park Press 2024 ranking — evidence of syndication, not independent measurement.
• The state spread is roughly ten points from top to bottom — larger than the USA’s two-point gap from the global baseline.

Who has the highest recorded IQ in the US?

• There is no official registry of extreme personal IQ scores in the USA, so “highest IQ” claims cannot be independently verified.
• Famous superlative scores come from unstandardized or self-reported tests and are treated by researchers as publicity, not data.
• A state average of 104.3 says nothing about the top-scoring individual in that state.

What this means: state rankings tell you about data collection habits, not about any individual’s intelligence.

Seven rows capture the global comparison — and one takeaway: the USA’s distance from the global baseline is smaller than the spread between its own top and bottom states.

What the sources say

Three moments from the coverage show how the numbers get presented — and how easily the caveats drop away.

“The vast, vast majority of Americans (83.9% in fact) fall between 85 and 145 IQ which is average to super genius.”

— Mike Sage, Medium

“The average IQ score in the US is 98.”

— Breeze Wellbeing blog

“National averages are estimated by aggregating results from large groups.”

— World Population Review

So where does that leave you? The useful number is not the 98 itself but the pattern around it: the American average sits close to the global baseline of 100, yet individual states swing more than ten points apart — and most of those state figures trace back to a few syndicated rankings. For anyone comparing IQ numbers, the choice is clear: check who published the estimate and how it was built, or you will keep quoting a recycled figure as if it were a federal statistic.

State-level variations across the country are explored in the piece on average IQ in the USA.

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