Cynthia is a distinctive girls' name in United States, ranking #636 in 2017 with 462 recorded births. The name reached its all-time peak in 1996 with 3,189 births ranking #101. Since 1996, the popularity has decreased by 85.5%. In 2017, approximately 1 in every 3,736 girls born was named Cynthia. FALLING Recent data shows the name is currently falling.