Marilyn is a moderately popular girls' name in United States, ranking #490 in 1998 with 518 recorded births. The name reached its all-time peak in 2013 with 837 births ranking #373. Since 1996, the popularity has decreased by 15.2%. In 1998, approximately 1 in every 3,411 girls born was named Marilyn. STABLE Recent data shows the name is currently stable.