Marilyn has been given to about 374,857 people in the United States since 1880. It was most common in 1947, which makes it a midcentury name.
Marilyn ranks 761st among American girls in 2025, with 356 born that year. Its best year was 1947, when 11,905 babies were given the name, ranking 29th. The typical living American called Marilyn is about 76 years old today. It is relatively most common in Wisconsin, where it accounts for 0.03% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.