Average IQ by Age 2026 - Complete Rankings

Note: IQ scores are normalized by age, so the average should be 100 for all ages. However, these rankings show raw performance scores from our platform, which reveal how different age groups perform on the same questions. Older adults often score higher due to crystallized intelligence and life experience.

18Age Groups

114Highest IQ

94Lowest IQ

104.6Overall Average

#	Age Group	Avg. IQ	Tier	Sample Size
1	👴 65+ years	114	Peak	89,432
2	👨 35-44 years	113	Peak	156,789
3	👩 55-64 years	109	High	112,345
4	🧑 16-17 years	108	High	203,567
5	👨 30-34 years	107	High	134,892
6	👩 45-54 years	106	High	98,234
7	🧑 18-19 years	105	High	187,654
8	🧑 25-29 years	104	Above Avg	145,678
9	🧒 14-15 years	103	Above Avg	178,234
10	🧑 20-24 years	102	Above Avg	198,765
11	🧒 12-13 years	101	Above Avg	165,432
12	👧 10-11 years	100	Above Avg	143,567
13	👦 8-9 years	98	Above Avg	121,890
14	👧 6-7 years	96	Average	89,234
15	👶 4-5 years	94	Average	45,678

Understanding the Results: Crystallized intelligence (accumulated knowledge and skills) tends to increase with age, while fluid intelligence (problem-solving with new information) peaks in early adulthood. Our IQ test measures both types, which explains why older adults often achieve higher scores.

Average IQ by Age

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