Sia is a distinctive girls' name in United States, ranking #3011 in 2011 with 57 recorded births. The name reached its all-time peak in 2025 with 215 births ranking #1107. Since 1996, the popularity has increased by 375.0%. In 2011, approximately 1 in every 30,856 girls born was named Sia. RISING Recent data shows the name is currently rising.