Siera is a distinctive girls' name in United States, ranking #6528 in 2011 with 20 recorded births. The name reached its all-time peak in 1998 with 150 births ranking #1225. Since 1996, the popularity has decreased by 86.6%. In 2011, approximately 1 in every 87,940 girls born was named Siera. FALLING Recent data shows the name is currently falling.