Siera is a distinctive girls' name in United States, ranking #6284 in 2009 with 22 recorded births. The name reached its all-time peak in 1998 with 150 births ranking #1225. Since 1996, the popularity has decreased by 85.2%. In 2009, approximately 1 in every 83,494 girls born was named Siera. FALLING Recent data shows the name is currently falling.