Rosario is a distinctive boys' name in United States, ranking #2979 in 2000 with 30 recorded births. The name reached its all-time peak in 1999 with 41 births ranking #2257. Since 1996, the popularity has decreased by 18.9%. In 2000, approximately 1 in every 65,464 boys born was named Rosario. FALLING Recent data shows the name is currently falling.