Sierra is a moderately popular girls' name in United States, ranking #175 in 2008 with 1,902 recorded births. This places Sierra in the top 1% of ranked US girls' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 1998 with 5,841 births ranking #51. Since 1996, the popularity has decreased by 65.3%. In 2008, approximately 1 in every 994 girls born was named Sierra. STABLE Recent data shows the name is currently stable.