Reagen is a distinctive girls' name in United States, ranking #4539 in 2001 with 27 recorded births. The name reached its all-time peak in 2008 with 35 births ranking #4432. Since 1996, the popularity has increased by 42.1%. In 2001, approximately 1 in every 66,687 girls born was named Reagen. FALLING Recent data shows the name is currently falling.