Siena is a distinctive girls' name in United States, ranking #1224 in 2004 with 182 recorded births. The name reached its all-time peak in 2018 with 496 births ranking #611. Since 1996, the popularity has increased by 91.6%. In 2004, approximately 1 in every 10,089 girls born was named Siena. STABLE Recent data shows the name is currently stable.