Rosario is a distinctive boys' name in United States, ranking #3158 in 2005 with 33 recorded births. The name reached its all-time peak in 1999 with 41 births ranking #2257. Since 1996, the popularity has decreased by 10.8%. In 2005, approximately 1 in every 60,520 boys born was named Rosario. FALLING Recent data shows the name is currently falling.