Theo — #80 US boys' name

What the Data Says About Theo

The Social Security Administration has registered 31,858 babies named Theo between 1880 and 2024, spanning 145 consecutive years of U.S. birth records. As a boy's name, Theo currently holds the #80 rank among boys for 2024. The name reached its historical peak in 2023, when 4,137 babies received it in a single year. Theo is classified as unisex in SSA records: the opposite-sex variant accounts for 3,482 additional births since 1880.

Decade-level aggregation shows that Theo performed strongest in the 2020s, accumulating 16,814 births during that ten-year window. Across the 15 decades of recorded activity, Theo shows a stable profile with only moderate drift from its peak decade. Geographically, the name is most concentrated in California, which accounts for 3,451 births — the largest state-level total in the dataset — followed by New York and Texas. In total, SSA state-level files list Theo in 51 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Theo in our reference dataset. These figures derive from SSA's annual national and state-level name files, which include any name appearing at least five times in a given year or state-year; names below that threshold are suppressed for privacy and therefore excluded from the totals shown here. The 31,858 total represents a lower bound — actual usage may be higher in years or states where the count fell below the disclosure floor. This page is provided for informational and research purposes only and does not constitute personal, legal, or naming advice.