Dempsey is a distinctive boys' name in United States, ranking #2015 in 2016 with 71 recorded births. The name reached its all-time peak in 2014 with 94 births ranking #1644. Since 1996, the popularity has increased by 222.7%. In 2016, approximately 1 in every 26,721 boys born was named Dempsey. FALLING Recent data shows the name is currently falling.