Cassia is a distinctive girls' name in England & Wales, ranking #1051 in 2025 with 32 recorded births. The name reached its all-time peak in 2024 with 40 births ranking #902. Since 1996, the popularity has increased by 300.0%. In 2025, approximately 1 in every 7,915 girls born was named Cassia. STABLE Recent data shows the name is currently stable.