How Many People Are Named Caio?
people named Caio are alive in the United States today (estimate)
About 1 in 478,690 people in the US has this name
Based on 722 babies named Caio in Social Security records from 1990 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎💎 Very Rare
Peak Year
40 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
Portuguese form of GAIUS.
Source of the meaning, origin, pronunciation and related names: Behind the Name.
⚧ Gender Distribution
All of the babies given the name Caio in the records were boys.
👥 Age Distribution
The average person named Caio alive today is about 13 years old, and 94% are under 30. Half of them were between 5 and 19 in 2025.
📈 Popularity Over Time
Caio first appears in the records in 1990 and was given most often in 2023, to 40 babies. In 2025, 35 babies got the name.
Babies given the name each year, 1990 to 2025
🏆 Rank History
Caio has never been one of the 100 most popular boys' names. Its best rank was #3,065, in 2023. In 2025 it ranked #3,321.
| Boys | |
|---|---|
| Rank in 2025 | #3,321 |
| Best rank | #3,065 (2023) |
| Years in the top 100 | None |
| Rank in its biggest decade | #4,091 in the 2010s |
📍 State-Wise Distribution
People named Caio alive today, by the state where they were born (estimate; state records start in 1910).
More people named Caio were born in Massachusetts than in any other state: about 84 of those alive today. Compared with the national rate in the same years, Caio was given 24.4 times as often in Massachusetts and 2.3 times in California.
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