Dempsey is a distinctive boys' name in United States, ranking #4360 in 2002 with 18 recorded births. The name reached its all-time peak in 2014 with 94 births ranking #1644. Since 1996, the popularity has decreased by 18.2%. In 2002, approximately 1 in every 107,860 boys born was named Dempsey. FALLING Recent data shows the name is currently falling.