Kailey is a moderately popular girls' name in United States, ranking #476 in 2014 with 664 recorded births. This places Kailey in the top 2% of ranked US girls' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 2004 with 1,439 births ranking #228. In 2014, approximately 1 in every 2,690 girls born was named Kailey. FALLING Recent data shows the name is currently falling.