Io
How to say it: EYE-oh · /ˈaɪoʊ/
Greek mythological name also a moon of Jupiter - pronounced EYE-oh, short ancient yet modern choice.
Io was the 11,600th most popular boys’ name in the United States in 2025, given to 10 babies of either sex (Social Security Administration). The 2020s are its busiest decade so far, its births are down about 6% in ten years, and it is projected to slip to #12,760 by 2030.
Updated · SSA 2025 data, published May 2026 · How we compute these figures
Key facts
| Rank among boys’ names, 2025 | #11,600 |
|---|---|
| Babies born in 2025 (both sexes) | 10 |
| Share of births | 1 in 331,534 |
| Peak decade | 2020s |
| Change over 10 years | −6% |
| Projected rank for 2030 (estimate) | #12,760 |
Sources: Social Security Administration (SSA). How we compute these figures.
Its life, decade by decade
Io is a newcomer: almost all of its history is from the last forty years.
What goes with it
In the classroom
In a class of 25 children born in 2025, the chance that another child is called Io is about under 1 in 200.
Around the world
This spelling is used in English, Greek, Japanese.
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