NameData
Name file · Girl · SSA 1880–2024
Marilou
Marilou is a girl's name.
▲ Risingthe Baby Boomers
3,231
Total named
66
Avg ageestimated
1948
Peak year
#11,158
Rank in 2024
Marilou peaked in 1948, when about 90 girls were given the name. Today it ranks 11,158th for girls, rising. Most people named Marilou today are around 66 years old (estimated) — squarely the Baby Boomers. In all, roughly 3,231 girls have been named Marilou since record-keeping began in 1915.

📈 Popularity over time

How many girls were named Marilou each year, 1880–2024.
Peak: 194890 girls192019401960198020002020

↔ Names from the same era

Other girls' names that peaked around the same time as Marilou:
TamieJohnettaNildaJacquelyneArnettaCaron
Data: U.S. Social Security Administration (public domain), 1880–2024. Average age is estimated from a survival curve, not actuarial tables.
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How we read a name

Every figure on this page comes from the U.S. Social Security Administration's public-domain record of names given to babies born in the United States from 1880 to 2024. The SSA only counts a name in a year if at least five babies received it.

Popularity & rank

The trajectory shows how many girls were named Marilou each year. The peak year is simply the year that count was highest, and the rank is where the name sat among all girls' names in 2024.

Estimated average age

We estimate the typical age of living people with this name by combining how many were born each year with a rough survival curve. It's a useful approximation for "how old does this name feel," not a precise actuarial figure — that's why we always label it estimated.

For general informational and entertainment purposes only. Counts reflect U.S. SSA card applications and may differ from total births. Figures are rounded.