Sia is a distinctive girls' name in United States, ranking #12243 in 1998 with 7 recorded births. The name reached its all-time peak in 2025 with 215 births ranking #1107. Since 1996, the popularity has decreased by 41.7%. In 1998, approximately 1 in every 252,413 girls born was named Sia. RISING Recent data shows the name is currently rising.