Sia is a distinctive girls' name in United States, ranking #1642 in 2015 with 131 recorded births. This places Sia in the top 9% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2025 with 215 births ranking #1107. Since 1996, the popularity has increased by 991.7%. In 2015, approximately 1 in every 13,623 girls born was named Sia. RISING Recent data shows the name is currently rising.