Rosario is a distinctive boys' name in United States, ranking #2538 in 1997 with 32 recorded births. The name reached its all-time peak in 1999 with 41 births ranking #2257. Since 1996, the popularity has decreased by 13.5%. In 1997, approximately 1 in every 58,909 boys born was named Rosario. FALLING Recent data shows the name is currently falling.