Kaio
Kaio was given to 22 boys in 2025, #4,618 among boys’ names; 429 Americans have been recorded with it since 1993 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Kaio by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Kaio?
#4,618 among boys’ names, 2025
Kaio rose from #8,368 in 2015 to #4,618 in 2025 among boys’ names; its share of boys born rose from 4.7 to 12.9 per million.
26 babies in 2023, the peak
Kaio peaked in 2023, when 26 boys were given it, #4,162 among boys’ names. The 22 births of 2025 are 85% of that peak.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2025 | 22 | #4,618 | 12.9 |
| 2024 | 26 | #4,136 | 15.1 |
| 2023 | 26 | #4,162 | 15.2 |
| 2022 | 17 | #5,531 | 9.7 |
| 2021 | 19 | #5,017 | 10.9 |
| 2020 | 18 | #5,134 | 10.4 |
| 2019 | 18 | #5,249 | 10.0 |
| 2018 | 20 | #4,837 | 11.0 |
| 2017 | 13 | #6,487 | 7.0 |
| 2016 | 15 | #5,913 | 7.9 |
Every recorded year (28)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2015 | 9 | #8,368 | 4.7 |
| 2014 | 19 | #4,969 | 9.9 |
| 2013 | 21 | #4,533 | 11.1 |
| 2012 | 16 | #5,593 | 8.4 |
| 2011 | 15 | #5,811 | 7.9 |
| 2010 | 21 | #4,598 | 10.9 |
| 2009 | 22 | #4,503 | 11.1 |
| 2008 | 23 | #4,326 | 11.3 |
| 2007 | 13 | #6,444 | 6.3 |
| 2006 | 11 | #7,173 | 5.4 |
| 2005 | 14 | #5,723 | 7.0 |
| 2004 | 8 | #8,521 | 4.0 |
| 2003 | 11 | #6,486 | 5.6 |
| 2002 | 8 | #8,045 | 4.1 |
| 2001 | 5 | #11,454 | 2.6 |
| 1998 | 5 | #10,445 | 2.6 |
| 1996 | 9 | #6,243 | 4.8 |
| 1993 | 5 | #9,448 | 2.5 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Kaio a boy’s or a girl’s name?
Kaio has been recorded only for boys: SSA lists no girls with the name in 28 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Kaio: the SSA national file counts each sex separately.
How many people are named Kaio, and how old are they?
An estimated 425 Americans named Kaio and born in the U.S. are alive in 2026 (99% of everyone recorded); the median is 12 years old and half are between 5 and 18. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 360 people named Kaio (5 women and girls, 355 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 303 born in the U.S. The Census count is 19% above that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Names spelled alike
Of these 8 names spelled alike, given to 89,779 babies since 1880, Kaio is the seventh most given (<1% of them). In 2025 it was given to 22 of their 4,584 babies (<1%), the sixth most given that year.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Kaio
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Kaio and names like it
- Compare Kaio and KaiBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2020sKaio peaked in 2023.
- Massachusetts’s most given namesThe state where SSA recorded the most babies named Kaio since 1910.
- The top names of 2023The year the most babies were named Kaio.
- The names of Generation AlphaMost people named Kaio alive today were born 2013-2025.
- Names starting with KMost given first.