Kourtney is a distinctive girls' name in United States, ranking #1098 in 2015 with 236 recorded births. The name reached its all-time peak in 1996 with 594 births ranking #429. Since 1996, the popularity has decreased by 60.3%. In 2015, approximately 1 in every 7,562 girls born was named Kourtney. FALLING Recent data shows the name is currently falling.