Ilsa is a distinctive girls' name in United States, ranking #5484 in 2003 with 22 recorded births. This places Ilsa in the top 30% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2011 with 34 births ranking #4288. Since 1996, the popularity has increased by 15.8%. In 2003, approximately 1 in every 83,048 girls born was named Ilsa. RISING Recent data shows the name is currently rising.