Siera is a distinctive girls' name in United States, ranking #2339 in 2005 with 77 recorded births. The name reached its all-time peak in 1998 with 150 births ranking #1225. Since 1996, the popularity has decreased by 48.3%. In 2005, approximately 1 in every 23,996 girls born was named Siera. FALLING Recent data shows the name is currently falling.