Rilley is a distinctive girls' name in United States, ranking #15147 in 2007 with 7 recorded births. This places Rilley in the bottom 26% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2009 with 8 births ranking #13431. In 2007, approximately 1 in every 274,635 girls born was named Rilley. FALLING Recent data shows the name is currently falling.