Sia is a distinctive girls' name in United States, ranking #5389 in 2003 with 23 recorded births. The name reached its all-time peak in 2025 with 215 births ranking #1107. Since 1996, the popularity has increased by 91.7%. In 2003, approximately 1 in every 79,437 girls born was named Sia. RISING Recent data shows the name is currently rising.