Hilary — #4111 US unisex name

What the Data Says About Hilary

The Social Security Administration has registered 24,144 babies named Hilary between 1914 and 2024, spanning 111 consecutive years of U.S. birth records. As a girl's name, Hilary currently holds the #4111 rank among girls for 2024. The name reached its historical peak in 1990, when 1,217 babies received it in a single year. Hilary is classified as unisex in SSA records: the opposite-sex variant accounts for 2,197 additional births since 1882.

Decade-level aggregation shows that Hilary performed strongest in the 1980s, accumulating 8,337 births during that ten-year window. Across the 12 decades of recorded activity, Hilary shows a clear decline from its mid-century high. Geographically, the name is most concentrated in California, which accounts for 3,291 births — the largest state-level total in the dataset — followed by New York and Texas. In total, SSA state-level files list Hilary in 51 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Hilary 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 24,144 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.