Marilyn is a moderately popular girls' name in United States, ranking #426 in 2015 with 748 recorded births. The name reached its all-time peak in 2013 with 837 births ranking #373. Since 1996, the popularity has increased by 22.4%. In 2015, approximately 1 in every 2,386 girls born was named Marilyn. STABLE Recent data shows the name is currently stable.