Kailey is a distinctive boys' name in United States, ranking #7264 in 2004 with 10 recorded births. This places Kailey in the bottom 45% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2004 with 10 births ranking #7264. In 2004, approximately 1 in every 198,480 boys born was named Kailey. STABLE Recent data shows the name is currently stable.