Castor — #7018 US boys' name

What the Data Says About Castor

The Social Security Administration has registered 366 babies named Castor between 1998 and 2024, spanning 27 consecutive years of U.S. birth records. As a boy's name, Castor currently holds the #7018 rank among boys for 2024. The name reached its historical peak in 2016, when 29 babies received it in a single year.

Decade-level aggregation shows that Castor performed strongest in the 2010s, accumulating 176 births during that ten-year window. Across the 4 decades of recorded activity, Castor shows notable generational variation in parental adoption. Geographically, the name is most concentrated in Texas, which accounts for 5 births — the largest state-level total in the dataset — followed by . In total, SSA state-level files list Castor in 1 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Castor 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 366 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.