Dempsey is a distinctive boys' name in United States, ranking #2161 in 2012 with 62 recorded births. The name reached its all-time peak in 2014 with 94 births ranking #1644. Since 1996, the popularity has increased by 181.8%. In 2012, approximately 1 in every 30,591 boys born was named Dempsey. FALLING Recent data shows the name is currently falling.