Sia is a distinctive girls' name in United States, ranking #3218 in 2006 with 52 recorded births. The name reached its all-time peak in 2025 with 215 births ranking #1107. Since 1996, the popularity has increased by 333.3%. In 2006, approximately 1 in every 36,559 girls born was named Sia. RISING Recent data shows the name is currently rising.