Dempsey is a distinctive boys' name in United States, ranking #2007 in 2011 with 68 recorded births. The name reached its all-time peak in 2014 with 94 births ranking #1644. Since 1996, the popularity has increased by 209.1%. In 2011, approximately 1 in every 27,926 boys born was named Dempsey. FALLING Recent data shows the name is currently falling.