Ilsa is a distinctive girls' name in United States, ranking #5969 in 2009 with 23 recorded births. The name reached its all-time peak in 2011 with 34 births ranking #4288. Since 1996, the popularity has increased by 21.1%. In 2009, approximately 1 in every 79,864 girls born was named Ilsa. RISING Recent data shows the name is currently rising.