Marilyn is a moderately popular girls' name in United States, ranking #422 in 2012 with 744 recorded births. The name reached its all-time peak in 2013 with 837 births ranking #373. Since 1996, the popularity has increased by 21.8%. In 2012, approximately 1 in every 2,367 girls born was named Marilyn. STABLE Recent data shows the name is currently stable.