Kourtney is a distinctive girls' name in United States, ranking #847 in 2002 with 273 recorded births. The name reached its all-time peak in 1996 with 594 births ranking #429. Since 1996, the popularity has decreased by 54.0%. In 2002, approximately 1 in every 6,582 girls born was named Kourtney. FALLING Recent data shows the name is currently falling.