Kailen is a distinctive girls' name in United States, ranking #8876 in 2018 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 2018, approximately 1 in every 141,702 girls born was named Kailen. FALLING Recent data shows the name is currently falling.