Kailen is a distinctive girls' name in United States, ranking #9043 in 2017 with 12 recorded births. The name reached its all-time peak in 2007 with 41 births ranking #3880. Since 1996, the popularity has decreased by 33.3%. In 2017, approximately 1 in every 143,823 girls born was named Kailen. FALLING Recent data shows the name is currently falling.