Siera is a distinctive girls' name in United States, ranking #1318 in 1997 with 132 recorded births. This places Siera in the top 8% 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 11.4%. In 1997, approximately 1 in every 13,187 girls born was named Siera. FALLING Recent data shows the name is currently falling.