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2025 data, released 8 May 2026

2025 data, released 8 May 2026

Marilou

Marilou was not among the names given to 5 or more girls in 2025. Its best year was 1933, when it ranked 778th; the most babies were born in 1948 (90). More babies were named Marilou in the 1940s than in any other decade.

Meaning Not yet researched how we research meanings

Rank in 2025
Not rankedgirls
Babies in 2025
0girls
Girls and boys
Almost always a girl’s name2021–2025
Peak year
194890 babies
Total since 1880
3,231babies recorded

Marilou popularity since 1880

0255075100 1900192019401960198020002020
Girls Babies per year, US, from Social Security records. Years with fewer than 5 babies show as zero.
YearRank (girls)Babies (girls)
2025——
2020#11,7568
2010——
2000#11,4088
1990#5,44117
1980#5,13414
1970#2,90224
1960#1,45058
1950#1,03279
1940#92161
1930#79280
1920#3,25910
1910——
1900——
1890——
1880——

How popular is Marilou, counting every spelling?

Marilou is a spelling of Marylou, a name family that had 28 girls in 2025 across its spellings. Together these spellings went to 28 girls in 2025.

SpellingBabies 2025Official rankBabies 2021–2025
Marylou28#4,835126

Spellings count together when they sound the same in American English and are used for the same sex; nicknames and forms that sound different (such as Theo and Theodore) are kept apart. How we group spellings.

How old are people named Marilou?

About 1,800 people born in the US named Marilou are alive today, with a median age of 71; half are between 57 and 78. That makes Marilou a name most people associate with older generations.

0–910–1920–2930–3940–4950–5960–6970–7980–8990+
Estimated people alive in the US with the name, by age, mid-2026. The darker bar holds the median age.

Babies given the name each year (SSA) times the share of that birth year still alive (SSA life tables). Counts people born in the US only. Method.

Marilou by state

How common Marilou was among girls born in each state in 1946–1950, around its peak. It is notably more common than nationally in Michigan (1.9×), Ohio (1.8×). In 41 states fewer than five girls a year got the name, too few for SSA to publish, so those states show as zero.

Alaska: fewer than 5 a yearAK–Maine: fewer than 5 a yearME–Wisconsin: fewer than 5 a yearWI–Vermont: fewer than 5 a yearVT–New Hampshire: fewer than 5 a yearNH–Washington: 0.07 per 1,000 babiesWA0.07Idaho: fewer than 5 a yearID–Montana: fewer than 5 a yearMT–North Dakota: fewer than 5 a yearND–Minnesota: fewer than 5 a yearMN–Illinois: 0.04 per 1,000 babiesIL0.04Michigan: 0.09 per 1,000 babiesMI0.09New York: 0.04 per 1,000 babiesNY0.04Massachusetts: fewer than 5 a yearMA–Oregon: fewer than 5 a yearOR–Nevada: fewer than 5 a yearNV–Wyoming: fewer than 5 a yearWY–South Dakota: fewer than 5 a yearSD–Iowa: fewer than 5 a yearIA–Indiana: 0.04 per 1,000 babiesIN0.04Ohio: 0.09 per 1,000 babiesOH0.09Pennsylvania: 0.07 per 1,000 babiesPA0.07New Jersey: fewer than 5 a yearNJ–Connecticut: 0.06 per 1,000 babiesCT0.06Rhode Island: fewer than 5 a yearRI–California: 0.05 per 1,000 babiesCA0.05Utah: fewer than 5 a yearUT–Colorado: fewer than 5 a yearCO–Nebraska: fewer than 5 a yearNE–Missouri: fewer than 5 a yearMO–Kentucky: fewer than 5 a yearKY–West Virginia: fewer than 5 a yearWV–Virginia: fewer than 5 a yearVA–Maryland: fewer than 5 a yearMD–Delaware: fewer than 5 a yearDE–Arizona: fewer than 5 a yearAZ–New Mexico: fewer than 5 a yearNM–Kansas: fewer than 5 a yearKS–Arkansas: fewer than 5 a yearAR–Tennessee: fewer than 5 a yearTN–North Carolina: fewer than 5 a yearNC–South Carolina: fewer than 5 a yearSC–District of Columbia: fewer than 5 a yearDC–Oklahoma: fewer than 5 a yearOK–Louisiana: fewer than 5 a yearLA–Mississippi: fewer than 5 a yearMS–Alabama: fewer than 5 a yearAL–Georgia: fewer than 5 a yearGA–Hawaii: fewer than 5 a yearHI–Texas: 0.01 per 1,000 babiesTX0.01Florida: fewer than 5 a yearFL–
Babies per 1,000 of the same sex, Marilou, girls, 1946–1950. Darker means more common.

Names with a similar history

These names rose and fell in step with Marilou: their share of US girls followed the most similar curve since 1880. If you like Marilou, they share its era and feel.

Questions about the name Marilou

How popular is the name Marilou?

Marilou was not among the names given to 5 or more girls in 2025. Its best year was 1933, when it ranked 778th; the most babies were born in 1948 (90). More babies were named Marilou in the 1940s than in any other decade.

Is Marilou a boy or girl name?

In 2021–2025, almost always a girl’s name given the name Marilou in the US.

Where was Marilou most popular?

In 1946–1950, Marilou was most common in Michigan (0.09 per 1,000 girls), followed by Ohio and Pennsylvania.