Kourtney is a distinctive girls' name in United States, ranking #4502 in 2025 with 31 recorded births. The name reached its all-time peak in 1996 with 594 births ranking #429. Since 1996, the popularity has decreased by 94.8%. In 2025, approximately 1 in every 51,847 girls born was named Kourtney. FALLING Recent data shows the name is currently falling.