Search a recent education-level IQ table, compare sample sizes and year-over-year changes, and see why the relationship between schooling and IQ is real but not a simple causal staircase.
1 Quick Answer
Updated March 28, 2026 by Structural. There is no single universal IQ number for every education category, but there are recent published tables that show a strong association between completed education and IQ scores. This page uses one primary dataset: the International IQ Test education table published on January 1, 2026, based on 77,974 people who took the same test in 2025.
In that dataset, the 4-year degree group is highest at 103.06 from 13,741 participants. The more than 5-year degree group is slightly lower at 101.82, and the no diploma group is lowest at 97.3. That pattern shows a meaningful association, but also shows why these tables should not be read as a rigid more-years-always-equals-higher-IQ ladder.
Groups Ranked7
The source reports seven completed-education categories, not current enrollment status.
Participants77,974
All entries come from people who took the same online test during 2025.
Highest Group103.06
The 4-year degree group ranks first in this 2026 table.
Spread5.76
The gap from no diploma to 4-year degree is 5.76 IQ points in this dataset.
Use this tool to search an education category, compare its score with the dataset mean of 100, and inspect sample size before overinterpreting small differences. The default selection is 4-year degree because that is the highest group in this dataset and one of the most common search targets.
Selected Group4-year degree
Ranked first out of 7 education groups in this dataset.
Average IQ103.06
3.06 points above the dataset mean of 100.
Participants13,741
17.62% of the full 77,974-person dataset.
Closest Common LabelBachelor's degree
Useful as a common-language proxy, not a perfect global mapping.
Year-Over-Year Change-1.4
Compared with the source's previous-year table.
Interpretation#1 / 7
Highest group in this 2026 table, but not proof of pure causal effect.
Interpretation note: In this table, 4-year degree has a published mean of 103.06 from 13,741 participants. That makes it useful for within-dataset comparison, but it still does not prove that earning a degree mechanically creates a 3-point IQ boost by itself.
3 Full 2026 Education Table
This table keeps the source categories intact, then adds a plain-language proxy column so users can map the global categories onto common English-language degree labels more safely.
Showing 7 education groups.
Dataset mean: 100.00 | Source updated January 1, 2026
Rank
Education level
Closest common label
Average IQ
Participants
Share
Year change
Important mapping warning:3-year degree, 4-year degree, 5-year degree, and more than 5-year degree are source categories based on completed education duration. They do not map perfectly onto one country's degree system, which is why this page uses phrases like bachelor proxy and doctorate proxy instead of pretending the translation is exact.
4 How to Read This Pattern Carefully
Education and IQ are strongly associated, but the reason is more complicated than a single staircase. If you want a precise reading, keep four things in view:
Selection effects matter. Higher-IQ individuals are more likely, on average, to stay in school longer and complete more demanding degrees.
Education itself may also raise scores. A 2018 meta-analysis by Ritchie and Tucker-Drob found consistent evidence that additional schooling can improve intelligence-test performance by roughly 1 to 5 IQ points per added year on average.
The categories mix different fields and countries. A 4-year degree in one country is not identical to a 4-year degree in another, and field-of-study composition can change the group mean substantially.
The pattern is not perfectly linear. In this dataset, the 4-year group is highest, while the 5-year and more-than-5-year groups are slightly lower. That alone is enough to reject naive slogans like more years always means more IQ.
This is why the right conclusion is education level and IQ are meaningfully related, not one more year of school mechanically guarantees a fixed jump. For broader outcome context, see IQ and Success. For scoring context, see How IQ Scores Are Normed.
5 How to Answer College and PhD Queries Without Overstating
Many searchers ask for the average IQ of college students, bachelor's graduates, or PhD holders. The source dataset is still useful, but only if you map the query to the right available category and admit the limits of that mapping.
Query
Best available proxy in this dataset
Average IQ
Why it is only a proxy
Average IQ of college students
2-year, 3-year, and 4-year degree categories
98.92 to 103.06
The source reports completed education, not current student enrollment, so there is no single pure college-student number here.
Average IQ of bachelor's graduates
4-year degree
103.06
This is the closest common-language match in many systems, but degree structures differ globally.
Average IQ of PhD or doctorate holders
More than 5-year degree
101.82
The category is broader than doctorate alone, so it should be treated as an approximate doctoral-level proxy.
Average IQ of associate degree holders
2-year degree
98.92
This is the cleanest proxy because the duration and degree structure are relatively close.
6 Frequently Asked Questions
What is the average IQ by education level?
In the January 1, 2026 International IQ Test table based on 77,974 test-takers from 2025, the seven education categories range from 97.3 for no diploma to 103.06 for 4-year degree. The dataset mean remains 100.00 overall.
What is the average IQ of college students?
This source does not give one exact number for all college students because it reports completed education levels, not current student status. The closest completed-degree proxies are 2-year degree at 98.92, 3-year degree at 101.7, and 4-year degree at 103.06.
What is the average IQ of PhD holders?
The closest available category is more than 5-year degree at 101.82 from 9,059 participants. That is the most defensible proxy for doctorate-level education in this dataset, but it is broader than PhD alone.
Why is 4-year degree higher than more than 5-year degree here?
Because education-IQ tables reflect more than pure years of schooling. Field mix, country mix, age composition, self-selection, and how global degrees map into the source categories all matter. That is exactly why this page does not frame the table as a perfectly linear hierarchy.
Does education raise IQ?
Evidence suggests the answer is yes, modestly, on average, but that is only half the story. Earlier intelligence also predicts later education. The strongest reading is that both selection and education effects matter.
7 Sources and Related Guides
If you want to interpret education-level IQ data responsibly, pair this page with norming, age, country, and score-context pages instead of treating one table as a final truth.