Kourtney is a distinctive girls' name in United States, ranking #1202 in 2005 with 191 recorded births. The name reached its all-time peak in 1996 with 594 births ranking #429. Since 1996, the popularity has decreased by 67.8%. In 2005, approximately 1 in every 9,674 girls born was named Kourtney. FALLING Recent data shows the name is currently falling.