Ilsa is a distinctive girls' name in United States, ranking #7202 in 2004 with 16 recorded births. The name reached its all-time peak in 2011 with 34 births ranking #4288. Since 1996, the popularity has decreased by 15.8%. In 2004, approximately 1 in every 114,758 girls born was named Ilsa. RISING Recent data shows the name is currently rising.