Io
Masculine
Io is given to both — 36 boys and 190 girls since 1880. See other names given to both
Io entered the US charts in 2014, peaked at #9554 in 2020, ranks #12008 in 2025 — given to only a few children a year.
How old is the name Io?
Io first appears in US birth records in 2014 — 11 years ago. The typical Io is a kid of about 5 — this name's wave is very recent. Fewer than a hundred people named Io are estimated to be alive in the US today — a true one-of-a-kind name.
When was the name Io most popular?
Io peaked in 2020, reaching #9554 nationally. Today it ranks #12008, 2,454 places below that high. See the whole 2020 chart.
Io appears on this list:
What the data says
146 years of official birth records
The long climb, and where it stands now
The same years in position rather than babies
- First recorded
- 2014
- Most boys named
- 20147 — the highest on record
- Peak rank
- #9554reached in 2020
- Change vs 2023
- 0.0%5 in 2025, from 5
Rank is a position, a count is a headcount, and they move independently — a name can hold its rank while the number of babies behind it falls. Source: U.S. Social Security Administration.
Ios among us
Fewer than a hundred people named Io are estimated to be alive in the US today — a true one-of-a-kind name.
About 1 boy in 341,615 born in 2025 was named Io
Estimated from SSA birth records and published actuarial life tables. Method
Is it right for you
What happens to a name after it peaks
Fashion outlook
Io sits in the calm middle of the cycle — neither chasing a wave nor sliding off one. Middle-of-the-cycle names age slowly and predictably.
A scored estimate from 146 years of naming cycles — not a prophecy. Great names outlive statistics. How this is scored
Io beside its neighbors
The names ranked closest to Io in 2025, in babies rather than position — the bars are to scale.
US boys given each name in 2025.
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Io
Masculine · #12008 in the U.S.
Frequently asked
- How many Ios are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. Fewer than a hundred people named Io are estimated to be alive in the US today — a true one-of-a-kind name.
- How popular is the name Io in 2025?
- Io ranks #12008 among US boy names in 2025, with 5 babies given the name.
- How rare is the name Io?
- About 1 in every 341,615 US boys born in 2025 was named Io — 5 in all.
- Will my child share the name Io with classmates?
- Io will almost certainly be the only one in school.
Ranked beside Io
Names sitting at a similar level of popularity right now.
Garfield#12008 · Chas#12008 · Lew#12008 · Barney#12008 · Dewitt#12008 · Granville#12008 · Cicero#12008 · Solon#12008
Looking for what else is popular rather than what resembles Io? See the current top 100.
Choosing between Io and another name?
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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