Sierra is a distinctive boys' name in United States, ranking #6023 in 1997 with 10 recorded births. The name reached its all-time peak in 2004 with 16 births ranking #5207. Since 1996, the popularity has decreased by 16.7%. In 1997, approximately 1 in every 188,509 boys born was named Sierra. FALLING Recent data shows the name is currently falling.