Siena is a distinctive girls' name in United States, ranking #1382 in 2003 with 146 recorded births. The name reached its all-time peak in 2018 with 496 births ranking #611. Since 1996, the popularity has increased by 53.7%. In 2003, approximately 1 in every 12,514 girls born was named Siena. STABLE Recent data shows the name is currently stable.