Caio
Boy name · #3349 in 2025 · Uniqueness 63/100
In 2025, 35 baby boys were named Caio, placing it at #3349 in the official national rankings. A decade ago it stood at #4295, so the name has been rising over the past ten years. Roughly one in every 51,429 boys born in 2025 was named Caio.
Babies named Caio per year, 1880–2025. Source: SSA.
The 35-year story
Caio first appears in the Social Security records in 1990, when 6 boys received the name. Its all-time peak is essentially right now: 2023, with 40 babies and a rank of #3055. Names at their peak can keep climbing — or be one trend cycle from the long slide that eventually hits most popular names. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Unlock the 5-year forecast and compare Caio against up to 5 other names.
Uniqueness: will there be another Caio in class?
Caio scores 63 out of 100 on our uniqueness scale, which blends current rarity with five-year momentum — putting it in the "distinctive" band. That middle band is the sweet spot many parents hunt for: recognizable without being everywhere.
Where Caio is most common
Geography matters for names, and Caio is no exception. In 2025 the states with the most Caios were CA (5), FL (5), MA (5). Raw counts naturally favor populous states, but the spread still hints at where the name is part of the local naming culture.
Names like Caio
Statistically, parents drawn to Caio tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Makaio, Akio, Neko, Cato, and Coda.
MakaioAkioNekoCatoCodaAmilioCalanMiko
Rank history (last 25 years)
| Year | Babies named Caio | Rank |
|---|---|---|
| 2025 | 35 | #3314 |
| 2024 | 30 | #3693 |
| 2023 | 40 | #3055 |
| 2022 | 29 | #3774 |
| 2021 | 32 | #3497 |
| 2020 | 24 | #4141 |
| 2019 | 34 | #3347 |
| 2018 | 32 | #3446 |
| 2017 | 24 | #4224 |
| 2016 | 11 | #7157 |
| 2015 | 23 | #4295 |
| 2014 | 21 | #4538 |
| 2013 | 29 | #3582 |
| 2012 | 25 | #4003 |
| 2011 | 21 | #4509 |
| 2010 | 30 | #3531 |
| 2009 | 31 | #3476 |
| 2008 | 31 | #3486 |
| 2007 | 32 | #3379 |
| 2006 | 28 | #3602 |
| 2005 | 23 | #3941 |
| 2004 | 16 | #5007 |
| 2003 | 15 | #5035 |
| 2002 | 16 | #4703 |
| 2001 | 6 | #9243 |
Frequently asked questions
Is Caio a popular boy name?
Caio ranked #3349 among boys in 2025 with 35 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #4295.
When was the name Caio most popular?
Caio peaked in 2023, when 40 American boys received the name (ranked #3055 that year). That peak is current — the name is at or near its all-time high right now.
How rare is the name Caio?
In 2025, roughly 1 in 51,429 newborn American boys was named Caio. It scores 63/100 on our uniqueness scale (rarity blended with momentum), which we classify as "distinctive".
Data source: U.S. Social Security Administration name statistics, 1880–2025, national and state files. Counts reflect Social Security card applications; names with fewer than 5 occurrences in a state-year are suppressed by the SSA.