Lousie — girls' name

What the Data Says About Lousie

The Social Security Administration has registered 142 babies named Lousie between 1913 and 1962, spanning 50 consecutive years of U.S. birth records. As a girl's name, Lousie currently falls outside the top 1,000 girls' names for 1962. The name reached its historical peak in 1918, when 12 babies received it in a single year.

Decade-level aggregation shows that Lousie performed strongest in the 1920s, accumulating 57 births during that ten-year window. Across the 6 decades of recorded activity, Lousie shows a clear decline from its mid-century high. Geographically, the name is most concentrated in Mississippi, which accounts for 5 births — the largest state-level total in the dataset — followed by . In total, SSA state-level files list Lousie in 1 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Lousie 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 142 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.