Theo is a boy name with a modern feel, drawn from real birth records.
| Country | Births on record |
|---|---|
| United States since 1880 | 39,333 births |
| England & Wales since 1996 | 40,484 births |
| Ireland since 1964 | 2,081 births |
Counts come from national birth registrations: the U.S. Social Security Administration, England & Wales (ONS) and Ireland (CSO). Coverage spans differ, so totals aren't directly comparable across countries.
Babies named Theo per year — United States (1880–2025). United States peaked in 2023 (4,182/yr) · England & Wales peaked in 2022 (2,808/yr) · Ireland peaked in 2024 (252/yr).
Theo reached its peak in 2023, when it was the #130 most popular baby name in the United States — making it a quintessential 2020s name.
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