Rosario is a distinctive boys' name in United States, ranking #4344 in 2007 with 23 recorded births. The name reached its all-time peak in 1999 with 41 births ranking #2257. Since 1996, the popularity has decreased by 37.8%. In 2007, approximately 1 in every 90,228 boys born was named Rosario. FALLING Recent data shows the name is currently falling.