Ilsa is a distinctive girls' name in United States, ranking #4288 in 2011 with 34 recorded births. The name reached its all-time peak in 2011 with 34 births ranking #4288. Since 1996, the popularity has increased by 78.9%. In 2011, approximately 1 in every 51,730 girls born was named Ilsa. RISING Recent data shows the name is currently rising.