Marilou — #11136 US girls' name

What the Data Says About Marilou

The Social Security Administration has registered 3,231 babies named Marilou between 1915 and 2024, spanning 110 consecutive years of U.S. birth records. As a girl's name, Marilou currently holds the #11136 rank among girls for 2024. The name reached its historical peak in 1948, when 90 babies received it in a single year.

Decade-level aggregation shows that Marilou performed strongest in the 1940s, accumulating 729 births during that ten-year window. Across the 12 decades of recorded activity, Marilou shows a clear decline from its mid-century high. Geographically, the name is most concentrated in California, which accounts for 220 births — the largest state-level total in the dataset — followed by Ohio and Illinois. In total, SSA state-level files list Marilou in 18 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Marilou 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 3,231 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.