Sia is a distinctive girls' name in United States, ranking #10904 in 2001 with 9 recorded births. The name reached its all-time peak in 2025 with 215 births ranking #1107. Since 1996, the popularity has decreased by 25.0%. In 2001, approximately 1 in every 200,062 girls born was named Sia. RISING Recent data shows the name is currently rising.