Dempsey is a distinctive boys' name in United States, ranking #4470 in 2003 with 18 recorded births. This places Dempsey in the top 35% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2014 with 94 births ranking #1644. Since 1996, the popularity has decreased by 18.2%. In 2003, approximately 1 in every 109,737 boys born was named Dempsey. FALLING Recent data shows the name is currently falling.