Kourtney is a distinctive girls' name in United States, ranking #853 in 2013 with 304 recorded births. The name reached its all-time peak in 1996 with 594 births ranking #429. Since 1996, the popularity has decreased by 48.8%. In 2013, approximately 1 in every 5,771 girls born was named Kourtney. FALLING Recent data shows the name is currently falling.