Kourtney is a distinctive girls' name in United States, ranking #1472 in 2007 with 159 recorded births. The name reached its all-time peak in 1996 with 594 births ranking #429. Since 1996, the popularity has decreased by 73.2%. In 2007, approximately 1 in every 12,091 girls born was named Kourtney. FALLING Recent data shows the name is currently falling.