Baby Names US
boys' name ★ peaked 2023

Caio

Gender Boy Rank 2025 #3,322 Trend ↑ Rising 18%

Caio is a Portuguese masculine given name derived from the Latin name Gaius.

Rank 2025
#3,322
among boys · ↑386 vs 2024
Babies in 2025
35
named Caio · +17% vs 2024
How common
1 in 48,802
boys born in 2025
Peak year
2023
40 babies
All-time total
722
#6,314 all-time among boys
First recorded
1990
in Social Security records

Caio popularity over time

722 babies have been named Caio since 1990, according to official Social Security records. Switch measure to see births per year or the yearly rank.

Measure
Births per 1,000 babies of that sex, comparable across eras
0.010.010.020.0318801900192019401960198020002020Peak 2023Boys

By decade. Change compares yearly averages, so the current partial decade is on equal footing. Best rank is the name's best yearly rank within the decade.

Decade Boys Per year Change Best rank
1880s – – – –
1890s – – – –
1900s – – – –
1910s – – – –
1920s – – – –
1930s – – – –
1940s – – – –
1950s – – – –
1960s – – – –
1970s – – – –
1980s – – – –
1990s 73 7 – #5,170
2000s 209 21 +186% #3,385
2010s 250 25 +20% #3,359
2020s (to 2025) 190 32 +27% #3,067

Where Caio is heading

A five-year projection from the recent trend in births per 1,000 boys (damped so it flattens over time), converted to babies at today's birth totals. The implied rank places that projection in the 2025 field. A projection, not a promise: real trends bend.

Year Projected babies Per 1,000 boys Implied rank
2026 36 0.02 outside top 500
2027 36 0.02 outside top 500
2028 37 0.02 outside top 500
2029 37 0.02 outside top 500
2030 38 0.02 outside top 500

The story of Caio

Caio is rare for boys in the United States, ranked #3,322 in 2025 with 35 babies given the name. It is currently rising compared with a decade ago.

Since 1990, 722 American babies have been named Caio. Its peak came in 2023, when 40 newborns received the name, the signature sound of the 2020s.

The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Caio stood among all boys' names in any year, or use the compare tool to plot it against other names.

How old are people named Caio?

The median living Caio is about 12 years old; half are between 5 and 19. An estimated 700 people named Caio are alive in the United States today.

median 12 020406080100

Estimated from births per year and Social Security period life tables; an approximation of the living age distribution, by age in years.

Caio year by year

Every year since 2001, and five-year steps back to 1880. Rank is within each sex.

Year Boys Boys rank
2025 35 #3,322
2024 30 #3,708
2023 40 #3,067
2022 29 #3,787
2021 32 #3,510
2020 24 #4,160
2019 34 #3,359
2018 32 #3,457
2017 24 #4,242
2016 11 #7,216
2015 23 #4,311
2014 21 #4,557
2013 29 #3,592
2012 25 #4,025
2011 21 #4,530
2010 30 #3,545
2009 31 #3,485
2008 31 #3,497
2007 32 #3,385
2006 28 #3,613
2005 23 #3,957
2004 16 #5,046
2003 15 #5,071
2002 16 #4,732
2001 6 #9,430
2000 11 #5,968
1995 11 #5,170
1990 6 #7,298
1985 – –
1980 – –
1975 – –
1970 – –
1965 – –
1960 – –
1955 – –
1950 – –
1945 – –
1940 – –
1935 – –
1930 – –
1925 – –
1920 – –
1915 – –
1910 – –
1905 – –
1900 – –
1895 – –
1890 – –
1885 – –
1880 – –

Famous people named Caio

The most globally famous bearers of the name, ranked by fame across Wikipedia editions (Pantheon project, MIT).

  1. 1 Caio Júnior Caio Júnior Brazilian football player and manager (1965–2016) Contemporary
  2. 2 Caio Lucas Fernandes Caio Lucas Fernandes Emirati footballer (born 1994) Contemporary
  3. 3 Caio Alves Caio Alves Brazilian footballer b. 1986 · Contemporary

Portraits from Wikipedia (Wikimedia Commons).

Frequently asked questions

Quick answers about Caio, drawn from the same Social Security data as the charts above.

How old is the average Caio?

The median living Caio is about 12 years old. Half of all living Caios are between 5 and 19 years old.

How many people named Caio are alive today?

An estimated 700 people named Caio are alive in the United States, based on 722 recorded births and Social Security life tables.

What does the name Caio mean?

Caio is a Portuguese masculine given name derived from the Latin name Gaius.

How popular is the name Caio in 2025?

Caio ranked #3,322 among boys' names in the United States in 2025, with 35 babies given the name, according to Social Security Administration data.

How many people are named Caio?

722 babies have been named Caio in the United States since 1990, based on Social Security card applications.

When was the name Caio most popular?

Caio peaked in 2023, when 40 newborns received the name.

Is Caio a boy or girl name?

Caio is overwhelmingly a boy's name: 100% of babies with the name.

Is the name Caio rising or falling?

Caio is on the rise, noticeably more popular now than a decade ago.

Will Caio become more popular?

Caio is trending upward. If the recent trend holds, we project roughly 38 boys named Caio in 2030, which would rank outside the top 500. Forecasts assume the current trend continues and become less certain further out.

Who are famous people named Caio?

Well-known people named Caio include Caio Júnior (soccer player), Caio Lucas Fernandes (soccer player), Caio Alves (soccer player).

Names like Caio

Names that sound and feel close to Caio: shared sounds, similar era, similar popularity. Each links to its full history.

Compare Caio with similar names → More names starting with C →