Cleo — #603 US unisex name

What the Data Says About Cleo

The Social Security Administration has registered 33,044 babies named Cleo between 1880 and 2024, spanning 145 consecutive years of U.S. birth records. As a girl's name, Cleo currently holds the #603 rank among girls for 2024. The name reached its historical peak in 1920, when 1,049 babies received it in a single year. Cleo is classified as unisex in SSA records: the opposite-sex variant accounts for 11,508 additional births since 1880.

Decade-level aggregation shows that Cleo performed strongest in the 1920s, accumulating 8,218 births during that ten-year window. Across the 15 decades of recorded activity, Cleo shows a clear decline from its mid-century high. Geographically, the name is most concentrated in Texas, which accounts for 2,259 births — the largest state-level total in the dataset — followed by North Carolina and California. In total, SSA state-level files list Cleo in 45 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Cleo 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 33,044 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.