Siena is a distinctive girls' name in United States, ranking #1335 in 1999 with 134 recorded births. The name reached its all-time peak in 2018 with 496 births ranking #611. Since 1996, the popularity has increased by 41.1%. In 1999, approximately 1 in every 13,237 girls born was named Siena. STABLE Recent data shows the name is currently stable.