Caio
Boy name · #3349 in 2025 · Very rare
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. 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?
On our rarity read — which blends how common Caio is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Caio will likely be the only one in the room, with the occasional spelling-out as the price.
Where Caio is most common
State-level data for Caio is too sparse in 2025 to rank by rate — in most states its count falls below the SSA's per-state reporting threshold (counts under 5 are withheld).
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. On our rarity scale (rarity blended with momentum) we classify it as "very rare".
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.