Sierra is a distinctive boys' name in United States, ranking #8098 in 2000 with 8 recorded births. The name reached its all-time peak in 2004 with 16 births ranking #5207. Since 1996, the popularity has decreased by 33.3%. In 2000, approximately 1 in every 245,492 boys born was named Sierra. FALLING Recent data shows the name is currently falling.