Cynthia is a distinctive girls' name in United States, ranking #748 in 2019 with 378 recorded births. The name reached its all-time peak in 1996 with 3,189 births ranking #101. Since 1996, the popularity has decreased by 88.1%. In 2019, approximately 1 in every 4,438 girls born was named Cynthia. FALLING Recent data shows the name is currently falling.