The baby name Marilu appears in baby name data for the United States from 1945 to 2021. It was most popular in 1977 with 29 babies given the name.
Over the period shown, Marilu has stayed at a similar level of popularity.
| Year | Count |
|---|---|
| 1945 | 10 |
| 1952 | 5 |
| 1954 | 5 |
| 1961 | 15 |
| 1964 | 5 |
| 1966 | 5 |
| 1967 | 6 |
| 1970 | 13 |
| 1972 | 16 |
| 1973 | 5 |
| 1974 | 11 |
| 1975 | 12 |
| 1976 | 23 |
| 1977 | 29 |
| 1978 | 5 |
| 1979 | 6 |
| 1980 | 18 |
| 1981 | 7 |
| 1982 | 24 |
| 1983 | 10 |
| 1985 | 18 |
| 1986 | 18 |
| 1987 | 18 |
| 1988 | 9 |
| 1989 | 10 |
| 1990 | 10 |
| 1991 | 20 |
| 1992 | 13 |
| 1994 | 10 |
| 1995 | 15 |
| 1996 | 24 |
| 1997 | 12 |
| 2000 | 12 |
| 2001 | 10 |
| 2003 | 14 |
| 2005 | 14 |
| 2006 | 20 |
| 2008 | 7 |
| 2011 | 5 |
| 2014 | 5 |
| 2016 | 5 |
| 2021 | 8 |