Reiko is a distinctive girls' name in United States, ranking #19574 in 2009 with 5 recorded births. The name reached its all-time peak in 1997 with 11 births ranking #8199. Since 1996, the popularity has decreased by 44.4%. In 2009, approximately 1 in every 367,374 girls born was named Reiko. FALLING Recent data shows the name is currently falling.