Rosario is a distinctive boys' name in United States, ranking #2257 in 1999 with 41 recorded births. The name reached its all-time peak in 1999 with 41 births ranking #2257. Since 1996, the popularity has increased by 10.8%. In 1999, approximately 1 in every 46,831 boys born was named Rosario. FALLING Recent data shows the name is currently falling.