Siera is a distinctive girls' name in United States, ranking #12990 in 2025 with 7 recorded births. This places Siera in the bottom 25% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1998 with 150 births ranking #1225. Since 1996, the popularity has decreased by 95.3%. In 2025, approximately 1 in every 229,610 girls born was named Siera. FALLING Recent data shows the name is currently falling.