Reilley is a distinctive boys' name in United States, ranking #8274 in 2002 with 8 recorded births. This places Reilley in the bottom 34% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2008 with 16 births ranking #5710. In 2002, approximately 1 in every 242,684 boys born was named Reilley. STABLE Recent data shows the name is currently stable.