Sia is a distinctive girls' name in United States, ranking #1338 in 2021 with 166 recorded births. The name reached its all-time peak in 2025 with 215 births ranking #1107. Since 1996, the popularity has increased by 1,283.3%. In 2021, approximately 1 in every 9,878 girls born was named Sia. RISING Recent data shows the name is currently rising.