How Many People Are Named Marilou?
people named Marilou are alive in the United States today (estimate)
About 1 in 185,954 people in the US has this name
Based on 3,231 babies named Marilou in Social Security records from 1915 to 2024, and the share of each birth year still alive in 2025.
Popularity Rank
💎💎 Very Rare
Peak Year
90 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
Combination of MARIA and LOUISE.
Source of the meaning, origin, pronunciation and related names: Behind the Name.
⚧ Gender Distribution
All of the babies given the name Marilou in the records were girls.
👥 Age Distribution
The average person named Marilou alive today is about 65 years old, and 73% are 60 or older. Half of them were between 57 and 78 in 2025.
📈 Popularity Over Time
Marilou first appears in the records in 1915 and was given most often in 1948, to 90 babies. The last year it was given to at least 5 babies of one sex was 2024.
Babies given the name each year, 1915 to 2024
🏆 Rank History
Marilou has never been one of the 100 most popular girls' names. Its best rank was #778, in 1933.
| Girls | |
|---|---|
| Rank in 2025 | Not ranked |
| Best rank | #778 (1933) |
| Years in the top 100 | None |
| Rank in its biggest decade | #950 in the 1940s |
📍 State-Wise Distribution
People named Marilou alive today, by the state where they were born (estimate; state records start in 1910).
More people named Marilou were born in California than in any other state: about 159 of those alive today. Compared with the national rate in the same years, Marilou was given 3 times as often in Ohio, 2.9 times in Illinois and 2.9 times in Indiana.
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