Total births
13,112
Girls' name · since 1898
Marylou
Marylou has 13,112 recorded births since 1898 in federal Social Security data, most heavily in 1942 -- full year-by-year trend, decade aggregates, and state rankings follow.
- #4899
- among girls today
- 13,112
- born since 1898
- 1940s
- peak decade
- 72%
- more common than other girls
Yes -- Marylou is the #4899 most popular girls' name in the U.S. today, with 13,112 recorded since 1898.
Social Security Administration records show Marylou recorded 13,112 times among girls since 1898, holding rank #4899 nationally today, ahead of 72% of girls, peaking in the 1940s. This profile derives year-by-year birth trends, decade totals, and state-level distribution directly from SSA birth-registration files spanning 1898 to 2025.
- #4899 among girls today
- 13,112 born since 1898
- 1940s peak decade
- 72% more common than other girls
Data updated Jun 2026
The verdict
Marylou is currently the #4899 girls' name in America, more common than 72% of girls - 13,112 born since 1898, peaking in the 1940s.
- #4899
- among girls today
- 13,112
- born since 1898
- 1940s
- peak decade
- 72%
- more common than other girls
Marylou vs. every other girls name in current SSA rankings
#4899
of 17,726 girls in use
More common than 72% of names given to girls today.
1940s
Peak decade
24% of everyone ever named Marylou was born in this single decade.
1942
Single peak year
376 babies were named Marylou in 1942 - its busiest year on record.
How Marylou compares
13,112 Top 8% higher than 92% of 17,726 names currently given to girls
Based on all-time total births among currently-ranked girls names. Names with fewer occurrences are grouped into wider buckets on the right.
Source U.S. Social Security Administration, national baby name data
How the numbers stack up
Marylou's all-time total is 34x the median girls name, and Olivia still leads by a wide margin.
| Metric | Marylou | Median girls name (Emerly) | #1 girls name (Olivia) |
|---|---|---|---|
| All-time total births | 13,112 | 382 | 567,345 |
| Peak-year births | 376 | 48 | 19,840 |
Marylou's usage pattern, beyond the headline number
Splitting Marylou's full recorded timeline at 1963, 22% of its total births fall in the more recent half of the record versus 78% in the earlier half -- the name was more prevalent in its earlier era than it is today. Its quietest year on record was 1898, with just 5 recorded births -- worth weighing against the 1942 peak of 376 to see the full range of the name's swing in popularity.
Marylou at a glance
Outside the top 1,000Peak year
1942
Current rank
#4,899
Active since
1898
Marylou popularity over time
Annual U.S. births registered with the Social Security Administration · 1898–2025
- Peak year (1942)
- 376
- Annual births at peak, across 128 years of records
Marylou by decade
Total births in each ten-year window, peak vs trough at a glance
1940s was Marylou's strongest decade.
3,141 babies received the name during that ten-year window, about 24% of all-time use.
Marylou births by decade
Total births in each ten-year window
- 1890s 12
1890s
12 births
- 1900s 54
1900s
54 births
- 1910s 313
1910s
313 births
- 1920s 1,251
1920s
1,251 births
- 1930s
1930s
2,621 births
- 1940s
1940s
3,141 births
- 1950s
1950s
2,128 births
- 1960s
1960s
1,598 births
- 1970s 536
1970s
536 births
- 1980s 517
1980s
517 births
- 1990s 356
1990s
356 births
- 2000s 209
2000s
209 births
- 2010s 228
2010s
228 births
- 2020s 148
2020s
148 births
What this shows Peak: 1940s at 3,141 births (24% of all-time use).
How Marylou compares to similarly-sized names
Years in SSA records vs. share of all-time use concentrated in the single peak year, among 15 girls names closest to Marylou's total volume
Marylou vs 15 similarly-sized girls names
Marylou by state
Where Marylou concentrates geographically, total births since 1898
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | New York | | 1,742 | 13.3% |
| #2 | California | | 1,367 | 10.4% |
| #3 | Pennsylvania | | 1,084 | 8.3% |
| #4 | Texas | | 784 | 6.0% |
| #5 | Illinois | | 730 | 5.6% |
| #6 | New Jersey | | 668 | 5.1% |
| #7 | Michigan | | 598 | 4.6% |
| #8 | Ohio | | 561 | 4.3% |
New York share of Marylou's total US births 13.3%
Even split
1,742 of 13,112 births nationwide. Compared to a flat distribution across 32 reporting states.
Marylou appears in 32 states. Explore state details →
Frequently Asked Questions
How popular is the name Marylou? ▼
Since 1898, Social Security records show 13,112 babies named Marylou. Today it holds rank #4899 among girls. Its busiest year on record was 1942, with 376 births.
When was Marylou most popular? ▼
Marylou was most popular in the 1940s decade with 3,141 total births. The single peak year was 1942.
Where is Marylou most popular? ▼
The top states for the name Marylou are New York (1,742 births), California (1,367 births), Pennsylvania (1,084 births).
How long has the name Marylou been used? ▼
The SSA has tracked Marylou since 1898 -- 128 years through the most recent 2025 data.
What names are similar to Marylou? ▼
Names with a similar sound or spelling include Mary, Margaret, Maria, Martha, and 4 more. These share a common prefix and are also used for girls.
What to do with Marylou's data
- Marylou's decade-level peak was the 1940s (3,141 total births); usage has since declined to 148 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- New York records the most Marylous (1,742 births) -- see the full state breakdown if geography matters to your decision. New York names
- Weighing it against an alternative? Put two names side by side. Compare names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Marylou
Nearby Names Like Marylou
Names with a similar sound, spelling, or feel to Marylou
Mary Girl
#131 4,141,481 births
Margaret Girl
#119 1,264,774 births
Maria Girl
#74 566,111 births
Martha Girl
#666 551,741 births
Marie Girl
#632 540,077 births
Compare Marylou side by side: Marylou vs Mary Marylou vs Margaret Marylou vs Maria
Related Names
Names with a similar popularity rank to Marylou
Maureen #4898
144,276 births · Peak 1957
Agustina #4900
1,676 births · Peak 2004
Faustina #4897
1,820 births · Peak 1924
Lyna #4901
1,045 births · Peak 2004
Thora #4896
2,424 births · Peak 1916
Cozette #4902
1,563 births · Peak 2025
Bennie #4895
9,936 births · Peak 1929
Savana #4903
5,436 births · Peak 2000
Data Sources
Data as of June 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1898–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Marylou: #4899 Girls' Name - 13,112 Births, Peak 1942." NameAlmanac. Accessed via https://namealmanac.com/name/marylou. Licensed CC BY-SA 4.0.
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Marylou draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.