Dempsey is a distinctive boys' name in United States, ranking #1854 in 2013 with 77 recorded births. The name reached its all-time peak in 2014 with 94 births ranking #1644. Since 1996, the popularity has increased by 250.0%. In 2013, approximately 1 in every 24,562 boys born was named Dempsey. FALLING Recent data shows the name is currently falling.