Marylou is an established girls' name that peaked in 1942 and has since faded.
Marylou is a girl name. In 2025 it ranked #4,835 for girl births in the United States (and #8,383 across all names), given to 28 babies. Marylou first appears in 1898 and peaked in 1942 (376 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 28 | 28 | #4,835 |
| 2024 | 27 | 27 | #4,984 |
| 2023 | 25 | 25 | #5,207 |
| 2022 | 26 | 26 | #5,122 |
| 2021 | 20 | 20 | #6,092 |
| 2020 | 22 | 22 | #5,598 |
| 2019 | 23 | 23 | #5,558 |
| 2018 | 11 | 11 | #9,593 |
| 2017 | 34 | 34 | #4,282 |
| 2016 | 21 | 21 | #6,113 |
| 2015 | 25 | 25 | #5,406 |
| 2014 | 24 | 24 | #5,569 |
| 2013 | 34 | 34 | #4,306 |
| 2012 | 12 | 12 | #9,517 |
| 2011 | 22 | 22 | #6,072 |
| 2010 | 22 | 22 | #6,107 |
| 2009 | 16 | 16 | #7,945 |
| 2008 | 22 | 22 | #6,286 |
| 2007 | 25 | 25 | #5,638 |
| 2006 | 21 | 21 | #6,277 |
| 2005 | 16 | 16 | #7,375 |
| 2004 | 21 | 21 | #5,895 |
| 2003 | 15 | 15 | #7,454 |
| 2002 | 19 | 19 | #6,045 |
| 2001 | 28 | 28 | #4,400 |
| 2000 | 26 | 26 | #4,619 |
| 1999 | 26 | 26 | #4,406 |
| 1998 | 26 | 26 | #4,327 |
| 1997 | 35 | — | #3,341 |
| 1996 | 38 | — | #3,125 |
| 1995 | 33 | — | #3,398 |
| 1994 | 43 | — | #2,830 |
| 1993 | 42 | — | #2,864 |
| 1992 | 36 | — | #3,186 |
| 1991 | 42 | — | #2,821 |
| 1990 | 35 | — | #3,201 |
| 1989 | 39 | — | #2,848 |
| 1988 | 60 | — | #2,002 |
| 1987 | 54 | — | #2,054 |
| 1986 | 55 | — | #1,994 |
| 1985 | 75 | — | #1,599 |
| 1984 | 59 | — | #1,823 |
| 1983 | 41 | — | #2,339 |
| 1982 | 64 | — | #1,749 |
| 1981 | 39 | — | #2,475 |
| 1980 | 31 | — | #2,918 |
| 1979 | 34 | — | #2,653 |
| 1978 | 48 | — | #2,005 |
| 1977 | 46 | — | #2,081 |
| 1976 | 41 | — | #2,124 |
| 1975 | 45 | — | #1,973 |
| 1974 | 44 | — | #1,947 |
| 1973 | 54 | — | #1,677 |
| 1972 | 65 | — | #1,484 |
| 1971 | 73 | — | #1,435 |
| 1970 | 86 | — | #1,276 |
| 1969 | 66 | — | #1,447 |
| 1968 | 94 | — | #1,106 |
| 1967 | 90 | — | #1,100 |
| 1966 | 108 | — | #987 |
| 1965 | 127 | — | #893 |
| 1964 | 172 | — | #795 |
| 1963 | 207 | — | #708 |
| 1962 | 207 | — | #719 |
| 1961 | 300 | — | #580 |
| 1960 | 227 | — | #675 |
| 1959 | 223 | — | #670 |
| 1958 | 210 | — | #683 |
| 1957 | 236 | — | #640 |
| 1956 | 183 | — | #710 |
| 1955 | 168 | — | #734 |
| 1954 | 212 | — | #624 |
| 1953 | 174 | — | #686 |
| 1952 | 207 | — | #603 |
| 1951 | 253 | — | #522 |
| 1950 | 262 | — | #499 |
| 1949 | 284 | — | #478 |
| 1948 | 315 | — | #451 |
| 1947 | 286 | — | #486 |
| 1946 | 296 | — | #450 |
| 1945 | 280 | — | #426 |
| 1944 | 315 | — | #403 |
| 1943 | 373 | — | #372 |
| 1942 | 376 | — | #361 |
| 1941 | 316 | — | #387 |
| 1940 | 300 | — | #386 |
| 1939 | 315 | — | #369 |
| 1938 | 301 | — | #386 |
| 1937 | 337 | — | #350 |
| 1936 | 286 | — | #377 |
| 1935 | 300 | — | #367 |
| 1934 | 288 | — | #374 |
| 1933 | 243 | — | #408 |
| 1932 | 200 | — | #460 |
| 1931 | 179 | — | #480 |
| 1930 | 172 | — | #512 |
| 1929 | 183 | — | #498 |
| 1928 | 183 | — | #512 |
| 1927 | 281 | — | #410 |
| 1926 | 146 | — | #588 |
| 1925 | 82 | — | #824 |
| 1924 | 92 | — | #783 |
| 1923 | 91 | — | #767 |
| 1922 | 80 | — | #822 |
| 1921 | 54 | — | #1,029 |
| 1920 | 59 | — | #955 |
| 1919 | 64 | — | #881 |
| 1918 | 54 | — | #985 |
| 1917 | 33 | — | #1,275 |
| 1916 | 41 | — | #1,108 |
| 1915 | 42 | — | #1,035 |
| 1914 | 29 | — | #1,140 |
| 1913 | 12 | — | #1,848 |
| 1912 | 15 | — | #1,460 |
| 1911 | 14 | — | #1,274 |
| 1910 | 9 | — | #1,719 |
| 1909 | 12 | — | #1,261 |
| 1908 | 9 | — | #1,507 |
| 1906 | 6 | — | #1,871 |
| 1905 | 6 | — | #1,844 |
| 1904 | 5 | — | #2,069 |
| 1903 | 5 | — | #1,972 |
| 1901 | 6 | — | #1,601 |
| 1900 | 5 | — | #2,118 |
| 1899 | 7 | — | #1,350 |
| 1898 | 5 | — | #1,865 |