Cassey is a distinctive girls' name in United States, ranking #16162 in 2018 with 5 recorded births. This places Cassey in the bottom 11% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1998 with 48 births ranking #2764. Since 1996, the popularity has decreased by 86.5%. In 2018, approximately 1 in every 340,085 girls born was named Cassey. FALLING Recent data shows the name is currently falling.