Io is a unisex name with a rare feel, drawn from real birth records. Below you'll find how many babies have been named Io across the United States, UK, Ireland and New Zealand, how popular Io has been over the decades, and the year it peaked.
| Country | Births on record |
|---|---|
| United States since 1880 | 226 births |
| England & Wales since 1996 | 50 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 Io per year, United States (2000 to 2025). United States peaked in 2022 (24/yr) · England & Wales peaked in 2019 (6/yr).
Io is a rare baby name in the United States. It was most common in 2022, when it ranked #9,299 nationally (given to 28 babies that year).
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