Reilly — #2726 US unisex name

What the Data Says About Reilly

The Social Security Administration has registered 5,467 babies named Reilly between 1978 and 2024, spanning 47 consecutive years of U.S. birth records. As a girl's name, Reilly currently holds the #2726 rank among girls for 2024. The name reached its historical peak in 1998, when 379 babies received it in a single year. Reilly is classified as unisex in SSA records: the opposite-sex variant accounts for 4,510 additional births since 1953.

Decade-level aggregation shows that Reilly performed strongest in the 2000s, accumulating 2,437 births during that ten-year window. Across the 6 decades of recorded activity, Reilly shows a clear decline from its mid-century high. Geographically, the name is most concentrated in California, which accounts for 423 births — the largest state-level total in the dataset — followed by New York and Pennsylvania. In total, SSA state-level files list Reilly in 34 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Reilly 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 5,467 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.