Sia is a distinctive girls' name in United States, ranking #3777 in 2007 with 43 recorded births. The name reached its all-time peak in 2025 with 215 births ranking #1107. Since 1996, the popularity has increased by 258.3%. In 2007, approximately 1 in every 44,708 girls born was named Sia. RISING Recent data shows the name is currently rising.