Osa — #15255 US unisex name

What the Data Says About Osa

The Social Security Administration has registered 673 babies named Osa between 1880 and 2024, spanning 145 consecutive years of U.S. birth records. As a girl's name, Osa currently holds the #15255 rank among girls for 2024. The name reached its historical peak in 1892, when 21 babies received it in a single year. Osa is classified as unisex in SSA records: the opposite-sex variant accounts for 87 additional births since 1914.

Decade-level aggregation shows that Osa performed strongest in the 1890s, accumulating 139 births during that ten-year window. Across the 11 decades of recorded activity, Osa shows a clear decline from its mid-century high. Geographically, the name is most concentrated in Tennessee, which accounts for 6 births — the largest state-level total in the dataset — followed by . In total, SSA state-level files list Osa in 1 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Osa 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 673 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.