Marylou
Marylou was given to 28 girls in 2025, #4,834 among girls’ names; 13,112 Americans have been recorded with it since 1898 (Social Security Administration, published May 2026).
An estimated 7,390 Americans named Marylou and born in the U.S. are alive in 2026 (56% of everyone recorded); the median is 69 years old and half are between 55 and 79.
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Marylou by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Marylou mean?
Wiktionary, English section
Marylou is “a female given name.”
Variant of Mary Lou.
Meaning: Wiktionary, English section, as of Sep 25, 2026 (CC BY‑SA 4.0).
How popular is Marylou?
#4,834 among girls’ names, 2025
Marylou rose from #5,404 in 2015 to #4,834 in 2025 among girls’ names; its share of girls born rose from 14.0 to 17.4 per million.
376 babies in 1942, the peak
Marylou peaked in 1942, when 376 girls were given it, #361 among girls’ names. The 28 births of 2025 are 7% of that peak.
| Year | Births | Rank | Per 1,000 girls |
|---|---|---|---|
| 2025 | 28 | #4,834 | 0.02 |
| 2024 | 27 | #4,981 | 0.02 |
| 2023 | 25 | #5,204 | 0.02 |
| 2022 | 26 | #5,119 | 0.02 |
| 2021 | 20 | #6,088 | 0.01 |
| 2020 | 22 | #5,594 | 0.01 |
| 2019 | 23 | #5,554 | 0.01 |
| 2018 | 11 | #9,588 | 0.01 |
| 2017 | 34 | #4,281 | 0.02 |
| 2016 | 21 | #6,111 | 0.01 |
Every recorded year (126)
| Year | Births | Rank | Per 1,000 girls |
|---|---|---|---|
| 2015 | 25 | #5,404 | 0.01 |
| 2014 | 24 | #5,567 | 0.01 |
| 2013 | 34 | #4,304 | 0.02 |
| 2012 | 12 | #9,512 | 0.01 |
| 2011 | 22 | #6,069 | 0.01 |
| 2010 | 22 | #6,105 | 0.01 |
| 2009 | 16 | #7,941 | 0.01 |
| 2008 | 22 | #6,283 | 0.01 |
| 2007 | 25 | #5,635 | 0.01 |
| 2006 | 21 | #6,275 | 0.01 |
| 2005 | 16 | #7,370 | 0.01 |
| 2004 | 21 | #5,891 | 0.01 |
| 2003 | 15 | #7,449 | 0.01 |
| 2002 | 19 | #6,040 | 0.01 |
| 2001 | 28 | #4,396 | 0.02 |
| 2000 | 26 | #4,614 | 0.01 |
| 1999 | 26 | #4,402 | 0.01 |
| 1998 | 26 | #4,324 | 0.01 |
| 1997 | 35 | #3,338 | 0.02 |
| 1996 | 38 | #3,120 | 0.02 |
| 1995 | 33 | #3,393 | 0.02 |
| 1994 | 43 | #2,825 | 0.02 |
| 1993 | 42 | #2,859 | 0.02 |
| 1992 | 36 | #3,181 | 0.02 |
| 1991 | 42 | #2,815 | 0.02 |
| 1990 | 35 | #3,196 | 0.02 |
| 1989 | 39 | #2,842 | 0.02 |
| 1988 | 60 | #1,998 | 0.03 |
| 1987 | 54 | #2,053 | 0.03 |
| 1986 | 55 | #1,993 | 0.03 |
| 1985 | 75 | #1,598 | 0.04 |
| 1984 | 59 | #1,823 | 0.04 |
| 1983 | 41 | #2,338 | 0.02 |
| 1982 | 64 | #1,749 | 0.04 |
| 1981 | 39 | #2,475 | 0.02 |
| 1980 | 31 | #2,918 | 0.02 |
| 1979 | 34 | #2,653 | 0.02 |
| 1978 | 48 | #2,005 | 0.03 |
| 1977 | 46 | #2,081 | 0.03 |
| 1976 | 41 | #2,124 | 0.03 |
| 1975 | 45 | #1,973 | 0.03 |
| 1974 | 44 | #1,947 | 0.03 |
| 1973 | 54 | #1,677 | 0.04 |
| 1972 | 65 | #1,484 | 0.04 |
| 1971 | 73 | #1,435 | 0.04 |
| 1970 | 86 | #1,276 | 0.05 |
| 1969 | 66 | #1,447 | 0.04 |
| 1968 | 94 | #1,106 | 0.06 |
| 1967 | 90 | #1,100 | 0.05 |
| 1966 | 108 | #987 | 0.06 |
| 1965 | 127 | #893 | 0.07 |
| 1964 | 172 | #795 | 0.09 |
| 1963 | 207 | #708 | 0.11 |
| 1962 | 207 | #719 | 0.11 |
| 1961 | 300 | #580 | 0.15 |
| 1960 | 227 | #675 | 0.11 |
| 1959 | 223 | #670 | 0.11 |
| 1958 | 210 | #683 | 0.10 |
| 1957 | 236 | #639 | 0.12 |
| 1956 | 183 | #709 | 0.09 |
| 1955 | 168 | #733 | 0.09 |
| 1954 | 212 | #623 | 0.11 |
| 1953 | 174 | #685 | 0.09 |
| 1952 | 207 | #602 | 0.11 |
| 1951 | 253 | #521 | 0.14 |
| 1950 | 262 | #498 | 0.15 |
| 1949 | 284 | #477 | 0.17 |
| 1948 | 315 | #451 | 0.19 |
| 1947 | 286 | #486 | 0.16 |
| 1946 | 296 | #450 | 0.19 |
| 1945 | 280 | #426 | 0.21 |
| 1944 | 315 | #403 | 0.24 |
| 1943 | 373 | #372 | 0.27 |
| 1942 | 376 | #361 | 0.28 |
| 1941 | 316 | #387 | 0.26 |
| 1940 | 300 | #386 | 0.26 |
| 1939 | 315 | #369 | 0.29 |
| 1938 | 301 | #386 | 0.27 |
| 1937 | 337 | #350 | 0.32 |
| 1936 | 286 | #377 | 0.27 |
| 1935 | 300 | #367 | 0.29 |
| 1934 | 288 | #374 | 0.28 |
| 1933 | 243 | #408 | 0.24 |
| 1932 | 200 | #460 | 0.19 |
| 1931 | 179 | #480 | 0.17 |
| 1930 | 172 | #512 | 0.15 |
| 1929 | 183 | #498 | 0.16 |
| 1928 | 183 | #512 | 0.16 |
| 1927 | 281 | #410 | 0.24 |
| 1926 | 146 | #588 | 0.12 |
| 1925 | 82 | #824 | 0.07 |
| 1924 | 92 | #783 | 0.07 |
| 1923 | 91 | #767 | 0.08 |
| 1922 | 80 | #822 | 0.07 |
| 1921 | 54 | #1,029 | 0.04 |
| 1920 | 59 | #955 | 0.05 |
| 1919 | 64 | #881 | 0.06 |
| 1918 | 54 | #985 | 0.05 |
| 1917 | 33 | #1,275 | 0.03 |
| 1916 | 41 | #1,108 | 0.04 |
| 1915 | 42 | #1,035 | 0.04 |
| 1914 | 29 | #1,140 | 0.04 |
| 1913 | 12 | #1,848 | 0.02 |
| 1912 | 15 | #1,460 | 0.03 |
| 1911 | 14 | #1,274 | 0.03 |
| 1910 | 9 | #1,719 | 0.02 |
| 1909 | 12 | #1,261 | 0.03 |
| 1908 | 9 | #1,507 | 0.03 |
| 1906 | 6 | #1,871 | 0.02 |
| 1905 | 6 | #1,843 | 0.02 |
| 1904 | 5 | #2,068 | 0.02 |
| 1903 | 5 | #1,971 | 0.02 |
| 1901 | 6 | #1,601 | 0.03 |
| 1900 | 5 | #2,117 | 0.02 |
| 1899 | 7 | #1,349 | 0.03 |
| 1898 | 5 | #1,864 | 0.02 |
Ranks and shares: girls’ names in each year’s SSA file; share of all girls SSA recorded that year.
Is Marylou a boy’s or a girl’s name?
Marylou has been recorded only for girls: SSA lists no boys with the name in 126 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Marylou: the SSA national file counts each sex separately.
How many people are named Marylou, and how old are they?
7,390 alive in 2026, estimated
That is 56% of the 13,112 Americans ever recorded as Marylou. The median Marylou alive today is 69 years old; half are between 55 and 79.
The 2020 Census counted 26,002 people named Marylou (25,969 women and girls, 33 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 8,575 born in the U.S. The Census count is 3.0 times that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
Alive today, by age
Alive today, by generation
| Generation | Born | Alive |
|---|---|---|
| Silent Generation | 1928-1945 | 1,630 |
| Baby Boomers | 1946-1964 | 3,380 |
| Generation X | 1965-1980 | 967 |
| Millennials | 1981-1996 | 733 |
| Generation Z | 1997-2012 | 348 |
| Generation Alpha | 2013-2025 | 318 |
An estimate, not a count. SSA’s files count people born in the United States who received a Social Security number, so anyone born abroad is not in them; before 1937 most people got a number as adults, and their survival is counted from that age.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Where are babies named Marylou born?
The states with the most babies named Marylou are New York, California and Pennsylvania, with 43% of its births recorded by state since 1910.
| State | Since 1910 | Rank, girls | vs. national |
|---|---|---|---|
| New York | 1,742 | not ranked | 1.6× |
| California | 1,367 | not ranked | 1.5× |
| Pennsylvania | 1,084 | not ranked | 1.3× |
| Texas | 784 | not ranked | 1.0× |
| Illinois | 730 | not ranked | 1.1× |
| New Jersey | 668 | not ranked | 1.7× |
| Michigan | 598 | not ranked | 1.1× |
| Ohio | 561 | not ranked | 0.8× |
| Massachusetts | 436 | not ranked | 1.1× |
| Connecticut | 357 | not ranked | 2.1× |
Where Marylou is more common than its national share predicts
Relative to its national share, Marylou is most over-represented in New Mexico: since 1910 it was given 2.1 times as often there as its national share each year would predict.
States: SSA state file, 1910-2025, published May 8, 2026; births count girls and boys together, and the rank is among girls’ names in the state in 2025. The file leaves out any state and year with fewer than 5 babies of the name, so small states are undercounted; each ratio compares the state’s births of Marylou with the births its national share predicts year by year, for states with at least 100 births of the name.
Names spelled alike
Of these 7 names spelled alike, given to 33,988 babies since 1880, Marylou is the most given (39% of them). In 2025 it was given to 28 of their 267 babies (10%), the second most given that year.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Marylou
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Marylou and names like it
- Compare Marylou and MarloBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1940sMarylou peaked in 1942.
- New York’s most given namesThe state where SSA recorded the most babies named Marylou since 1910.
- The top names of 1942The year the most babies were named Marylou.
- The names of the Baby BoomersMost people named Marylou alive today were born 1946-1964.
- Names starting with MMost given first.