Sia is a distinctive girls' name in United States, ranking #2975 in 2012 with 58 recorded births. The name reached its all-time peak in 2025 with 215 births ranking #1107. Since 1996, the popularity has increased by 383.3%. In 2012, approximately 1 in every 30,358 girls born was named Sia. RISING Recent data shows the name is currently rising.