Caio is a boy name with a rare feel, drawn from real birth records. Below you'll find how many babies have been named Caio across the United States, UK, Ireland and New Zealand, how popular Caio has been over the decades, and the year it peaked.
| Country | Births on record |
|---|---|
| United States since 1880 | 722 births |
| England & Wales since 1996 | 562 births |
| Ireland since 1964 | 10 births |
Counts come from official national birth-registration statistics: U.S. Social Security Administration, England & Wales (Office for National Statistics), Scotland (National Records of Scotland), Northern Ireland (NISRA), Ireland (Central Statistics Office) and New Zealand (Dept. of Internal Affairs). Coverage spans differ, so totals aren't directly comparable across countries.
Babies named Caio per year, England & Wales (1996 to 2025). England & Wales peaked in 2022 (43/yr) · United States peaked in 2023 (40/yr) · Ireland peaked in 2020 (6/yr).
Caio is a rare baby name in the United States. It was most common in 2023, when it ranked #6,636 nationally (given to 73 babies that year).
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