Kourtney is a distinctive girls' name in United States, ranking #721 in 2012 with 385 recorded births. The name reached its all-time peak in 1996 with 594 births ranking #429. Since 1996, the popularity has decreased by 35.2%. In 2012, approximately 1 in every 4,573 girls born was named Kourtney. FALLING Recent data shows the name is currently falling.