Cynthia is a distinctive girls' name in United States, ranking #692 in 2018 with 419 recorded births. The name reached its all-time peak in 1996 with 3,189 births ranking #101. Since 1996, the popularity has decreased by 86.9%. In 2018, approximately 1 in every 4,058 girls born was named Cynthia. FALLING Recent data shows the name is currently falling.