Rosario is a distinctive boys' name in United States, ranking #4238 in 2008 with 24 recorded births. The name reached its all-time peak in 1999 with 41 births ranking #2257. Since 1996, the popularity has decreased by 35.1%. In 2008, approximately 1 in every 84,998 boys born was named Rosario. FALLING Recent data shows the name is currently falling.