Rosario is a distinctive boys' name in United States, ranking #3139 in 2004 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 2004, approximately 1 in every 62,025 boys born was named Rosario. FALLING Recent data shows the name is currently falling.