Siena is a distinctive girls' name in United States, ranking #657 in 2007 with 452 recorded births. The name reached its all-time peak in 2018 with 496 births ranking #611. Since 1996, the popularity has increased by 375.8%. In 2007, approximately 1 in every 4,253 girls born was named Siena. STABLE Recent data shows the name is currently stable.