Cosette is a distinctive girls' name in United States, ranking #1780 in 2025 with 113 recorded births. The name reached its all-time peak in 2015 with 141 births ranking #1554. Since 1996, the popularity has increased by 213.9%. In 2025, approximately 1 in every 14,224 girls born was named Cosette. STABLE Recent data shows the name is currently stable.