Cynthia is a distinctive girls' name in United States, ranking #806 in 2021 with 346 recorded births. The name reached its all-time peak in 1996 with 3,189 births ranking #101. Since 1996, the popularity has decreased by 89.2%. In 2021, approximately 1 in every 4,739 girls born was named Cynthia. FALLING Recent data shows the name is currently falling.