Dempsey is a distinctive boys' name in United States, ranking #4199 in 1999 with 17 recorded births. The name reached its all-time peak in 2014 with 94 births ranking #1644. Since 1996, the popularity has decreased by 22.7%. In 1999, approximately 1 in every 112,946 boys born was named Dempsey. FALLING Recent data shows the name is currently falling.