Sia is a distinctive girls' name in United States, ranking #3168 in 2004 with 49 recorded births. The name reached its all-time peak in 2025 with 215 births ranking #1107. Since 1996, the popularity has increased by 308.3%. In 2004, approximately 1 in every 37,472 girls born was named Sia. RISING Recent data shows the name is currently rising.