Siena is a distinctive girls' name in United States, ranking #627 in 2009 with 481 recorded births. The name reached its all-time peak in 2018 with 496 births ranking #611. Since 1996, the popularity has increased by 406.3%. In 2009, approximately 1 in every 3,819 girls born was named Siena. STABLE Recent data shows the name is currently stable.