Marylou: Name Popularity, History & Rankings (1880

Rank 2025

#4,835

among girls · ↑149 vs 2024

Babies in 2025

named Marylou · +4% vs 2024

How common

1 in 57,402

girls born in 2025

Peak year

1942

376 babies

All-time total

13,112

#1,410 all-time among girls

First recorded

1898

in Social Security records

Marylou popularity over time

13,112 babies have been named Marylou since 1898, according to official Social Security records. Switch measure to see births per year or the yearly rank.

Measure

Births per 1,000 babies of that sex, comparable across eras

By decade. Change compares yearly averages, so the current partial decade is on equal footing. Best rank is the name's best yearly rank within the decade.

Decade	Girls	Per year	Change	Best rank
1880s	–	–	–	–
1890s	12	1	–	#1,350
1900s	54	5	+350%	#1,261
1910s	313	31	+480%	#881
1920s	1,251	125	+300%	#410
1930s	2,621	262	+110%	#350
1940s	3,141	314	+20%	#361
1950s	2,128	213	-32%	#499
1960s	1,598	160	-25%	#580
1970s	536	54	-66%	#1,276
1980s	517	52	-4%	#1,599
1990s	356	36	-31%	#2,821
2000s	209	21	-41%	#4,400
2010s	228	23	+9%	#4,282
2020s (to 2025)	148	25	+8%	#4,835

Where Marylou is heading

A five-year projection from the recent trend in births per 1,000 girls (damped so it flattens over time), converted to babies at today's birth totals. The implied rank places that projection in the 2025 field. A projection, not a promise: real trends bend.

Year	Projected babies	Per 1,000 girls	Implied rank
2026	31	0.02	outside top 500
2027	33	0.02	outside top 500
2028	35	0.02	outside top 500
2029	37	0.02	outside top 500
2030	39	0.02	outside top 500

The story of Marylou

Marylou is rare for girls in the United States, ranked #4,835 in 2025 with 28 babies given the name. It is currently holding steady compared with a decade ago.

Since 1898, 13,112 American babies have been named Marylou. Its peak came in 1942, when 376 newborns received the name, the signature sound of the 1940s.

The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Marylou stood among all girls' names in any year, or use the compare tool to plot it against other names.

How old are people named Marylou?

The median living Marylou is about 69 years old; half are between 56 and 80. An estimated 8,000 people named Marylou are alive in the United States today.

Estimated from births per year and Social Security period life tables; an approximation of the living age distribution, by age in years.

Marylou year by year

Every year since 2001, and five-year steps back to 1880. Rank is within each sex.

Year	Girls	Girls rank
2025	28	#4,835
2024	27	#4,984
2023	25	#5,207
2022	26	#5,122
2021	20	#6,092
2020	22	#5,598
2019	23	#5,558
2018	11	#9,593
2017	34	#4,282
2016	21	#6,113
2015	25	#5,406
2014	24	#5,569
2013	34	#4,306
2012	12	#9,517
2011	22	#6,072
2010	22	#6,107
2009	16	#7,945
2008	22	#6,286
2007	25	#5,638
2006	21	#6,277
2005	16	#7,375
2004	21	#5,895
2003	15	#7,454
2002	19	#6,045
2001	28	#4,400
2000	26	#4,619
1995	33	#3,398
1990	35	#3,201
1985	75	#1,599
1980	31	#2,918
1975	45	#1,973
1970	86	#1,276
1965	127	#893
1960	227	#675
1955	168	#734
1950	262	#499
1945	280	#426
1940	300	#386
1935	300	#367
1930	172	#512
1925	82	#824
1920	59	#955
1915	42	#1,035
1910	9	#1,719
1905	6	#1,844
1900	5	#2,118
1895	–	–
1890	–	–
1885	–	–
1880	–	–

Frequently asked questions

Quick answers about Marylou, drawn from the same Social Security data as the charts above.

How old is the average Marylou?

The median living Marylou is about 69 years old. Half of all living Marylous are between 56 and 80 years old.

How many people named Marylou are alive today?

An estimated 8,000 people named Marylou are alive in the United States, based on 13,112 recorded births and Social Security life tables.

What does the name Marylou mean?

Mary Lou, Mary-Lou, Marylou or Marilou is a feminine given name.

How popular is the name Marylou in 2025?

Marylou ranked #4,835 among girls' names in the United States in 2025, with 28 babies given the name, according to Social Security Administration data.

How many people are named Marylou?

13,112 babies have been named Marylou in the United States since 1898, based on Social Security card applications.

When was the name Marylou most popular?

Marylou peaked in 1942, when 376 newborns received the name.

Is Marylou a boy or girl name?

Marylou is overwhelmingly a girl's name: 100% of babies with the name.

Is the name Marylou rising or falling?

Marylou has been roughly stable over the past decade.

Will Marylou become more popular?

Marylou is trending upward. If the recent trend holds, we project roughly 39 girls named Marylou in 2030, which would rank outside the top 500. Forecasts assume the current trend continues and become less certain further out.

Names like Marylou

Names that sound and feel close to Marylou: shared sounds, similar era, similar popularity. Each links to its full history.

Compare Marylou with similar names → More names starting with M →