Reagen is a distinctive girls' name in United States, ranking #5452 in 2000 with 21 recorded births. The name reached its all-time peak in 2008 with 35 births ranking #4432. Since 1996, the popularity has increased by 10.5%. In 2000, approximately 1 in every 86,475 girls born was named Reagen. FALLING Recent data shows the name is currently falling.