Marilyn is a moderately popular girls' name in United States, ranking #404 in 2014 with 797 recorded births. The name reached its all-time peak in 2013 with 837 births ranking #373. Since 1996, the popularity has increased by 30.4%. In 2014, approximately 1 in every 2,241 girls born was named Marilyn. STABLE Recent data shows the name is currently stable.