Siena is a distinctive girls' name in United States, ranking #1465 in 2001 with 129 recorded births. The name reached its all-time peak in 2018 with 496 births ranking #611. Since 1996, the popularity has increased by 35.8%. In 2001, approximately 1 in every 13,958 girls born was named Siena. STABLE Recent data shows the name is currently stable.