Sydney — #288 US unisex name

What the Data Says About Sydney

The Social Security Administration has registered 177,413 babies named Sydney between 1886 and 2024, spanning 139 consecutive years of U.S. birth records. As a girl's name, Sydney currently holds the #288 rank among girls for 2024. The name reached its historical peak in 2000, when 10,243 babies received it in a single year. Sydney is classified as unisex in SSA records: the opposite-sex variant accounts for 9,383 additional births since 1880.

Decade-level aggregation shows that Sydney performed strongest in the 2000s, accumulating 76,442 births during that ten-year window. Across the 15 decades of recorded activity, Sydney shows a clear decline from its mid-century high. Geographically, the name is most concentrated in California, which accounts for 16,815 births — the largest state-level total in the dataset — followed by Texas and Ohio. In total, SSA state-level files list Sydney in 51 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Sydney 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 177,413 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.