Dempsey is a distinctive boys' name in United States, ranking #2003 in 2015 with 72 recorded births. The name reached its all-time peak in 2014 with 94 births ranking #1644. Since 1996, the popularity has increased by 227.3%. In 2015, approximately 1 in every 26,615 boys born was named Dempsey. FALLING Recent data shows the name is currently falling.