Rosario is a distinctive boys' name in United States, ranking #4361 in 2012 with 23 recorded births. This places Rosario in the top 31% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1999 with 41 births ranking #2257. Since 1996, the popularity has decreased by 37.8%. In 2012, approximately 1 in every 82,462 boys born was named Rosario. FALLING Recent data shows the name is currently falling.