Reagen is a distinctive girls' name in United States, ranking #4249 in 2005 with 33 recorded births. The name reached its all-time peak in 2008 with 35 births ranking #4432. Since 1996, the popularity has increased by 73.7%. In 2005, approximately 1 in every 55,991 girls born was named Reagen. FALLING Recent data shows the name is currently falling.