Aileen is a distinctive girls' name in United States, ranking #501 in 2001 with 550 recorded births. The name reached its all-time peak in 2009 with 685 births ranking #454. Since 1996, the popularity has increased by 81.5%. In 2001, approximately 1 in every 3,274 girls born was named Aileen. STABLE Recent data shows the name is currently stable.