Zo — #11221 US unisex name

What the Data Says About Zo

The Social Security Administration has registered 304 babies named Zo between 1957 and 2024, spanning 68 consecutive years of U.S. birth records. As a girl's name, Zo currently holds the #11221 rank among girls for 2024. The name reached its historical peak in 2017, when 40 babies received it in a single year. Zo is classified as unisex in SSA records: the opposite-sex variant accounts for 94 additional births since 2000.

Decade-level aggregation shows that Zo performed strongest in the 2010s, accumulating 173 births during that ten-year window. Across the 4 decades of recorded activity, Zo shows notable generational variation in parental adoption. Geographically, the name is most concentrated in Arizona, which accounts for 121 births — the largest state-level total in the dataset — followed by South Carolina. In total, SSA state-level files list Zo in 2 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Zo 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 304 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.