Marylou
Girl name · #4771 in 2025 · Very rare
How old is the name Marylou? In official American birth records, Marylou has been tracked continuously since 1898, giving it 127 years of documented American history.
Marylou ranks #4771 among American girls' names as of 2025, with 28 newborns given the name that year. A decade ago it stood at #5288, so the name has been rising over the past ten years. Roughly one in every 64,286 girls born in 2025 was named Marylou.
Babies named Marylou per year. Source: Official national birth records.
The 127-year story
Marylou first appears in the Social Security records in 1898, when 5 girls received the name. Its peak came in 1942, when 376 girls were named Marylou — good for #361 that year. Today's parents encounter it as a name from their grandparents’ generation, which is precisely the vintage window from which names get revived. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Unlock the 5-year forecast and compare Marylou against up to 5 other names.
Uniqueness: will there be another Marylou in class?
On our rarity read — which blends how common Marylou is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Marylou will likely be the only one in the room, with the occasional spelling-out as the price.
Where Marylou is most common
State-level data for Marylou is too sparse in 2025 to rank by rate — in most states its count falls below the SSA's per-state reporting threshold (counts under 5 are withheld).
Names like Marylou
Statistically, parents drawn to Marylou tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Maryann, Maryanne, Lou, Muriel, and Janette.
MaryannMaryanneLouMurielJanetteMaureenRosettaCarolynn
Rank history (last 25 years)
| Year | Babies named Marylou | Rank |
|---|---|---|
| 2025 | 28 | #4758 |
| 2024 | 27 | #4893 |
| 2023 | 25 | #5126 |
| 2022 | 26 | #5028 |
| 2021 | 20 | #5955 |
| 2020 | 22 | #5487 |
| 2019 | 23 | #5449 |
| 2018 | 11 | #9151 |
| 2017 | 34 | #4220 |
| 2016 | 21 | #5985 |
| 2015 | 25 | #5288 |
| 2014 | 24 | #5456 |
| 2013 | 34 | #4243 |
| 2012 | 12 | #9109 |
| 2011 | 22 | #5935 |
| 2010 | 22 | #5977 |
| 2009 | 16 | #7679 |
| 2008 | 22 | #6130 |
| 2007 | 25 | #5526 |
| 2006 | 21 | #6125 |
| 2005 | 16 | #7138 |
| 2004 | 21 | #5744 |
| 2003 | 15 | #7207 |
| 2002 | 19 | #5897 |
| 2001 | 28 | #4321 |
Frequently asked questions
How old is the name Marylou?
In official American birth records, the name Marylou first appeared in 1898 (over 127 years ago), when 5 newborn girls received the name. It has over a century of continuous American history.
Is Marylou a popular girl name?
Marylou ranked #4771 among girls in 2025 with 28 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #5288.
When was the name Marylou most popular?
Marylou peaked in 1942, when 376 American girls received the name (ranked #361 that year). Since 1942 the name has declined from that high.
How rare is the name Marylou?
In 2025, roughly 1 in 64,286 newborn American girls was named Marylou. On our rarity scale (rarity blended with momentum) we classify it as "very rare".
Data source: Official American birth records, 1880–2025, national and state files. Counts reflect registered birth records for American families.