Siera is a distinctive girls' name in United States, ranking #2098 in 2004 with 87 recorded births. This places Siera in the top 11% 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 41.6%. In 2004, approximately 1 in every 21,105 girls born was named Siera. FALLING Recent data shows the name is currently falling.