Sia is a distinctive girls' name in United States, ranking #3353 in 2009 with 50 recorded births. The name reached its all-time peak in 2025 with 215 births ranking #1107. Since 1996, the popularity has increased by 316.7%. In 2009, approximately 1 in every 36,737 girls born was named Sia. RISING Recent data shows the name is currently rising.