Kourtney is a distinctive girls' name in United States, ranking #1739 in 2017 with 122 recorded births. The name reached its all-time peak in 1996 with 594 births ranking #429. Since 1996, the popularity has decreased by 79.5%. In 2017, approximately 1 in every 14,147 girls born was named Kourtney. FALLING Recent data shows the name is currently falling.