Cassidy — #476 US unisex name

What the Data Says About Cassidy

The Social Security Administration has registered 60,279 babies named Cassidy between 1969 and 2024, spanning 56 consecutive years of U.S. birth records. As a girl's name, Cassidy currently holds the #476 rank among girls for 2024. The name reached its historical peak in 1999, when 3,395 babies received it in a single year. Cassidy is classified as unisex in SSA records: the opposite-sex variant accounts for 3,684 additional births since 1968.

Decade-level aggregation shows that Cassidy performed strongest in the 2000s, accumulating 21,177 births during that ten-year window. Across the 7 decades of recorded activity, Cassidy shows a clear decline from its mid-century high. Geographically, the name is most concentrated in California, which accounts for 6,188 births — the largest state-level total in the dataset — followed by Texas and New York. In total, SSA state-level files list Cassidy in 51 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Cassidy 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 60,279 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.