Reilley is a distinctive boys' name in United States, ranking #13608 in 2014 with 5 recorded births. This places Reilley in the bottom 3% 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 2014, approximately 1 in every 384,088 boys born was named Reilley. STABLE Recent data shows the name is currently stable.