Rosario is a distinctive boys' name in United States, ranking #4079 in 2011 with 25 recorded births. The name reached its all-time peak in 1999 with 41 births ranking #2257. Since 1996, the popularity has decreased by 32.4%. In 2011, approximately 1 in every 75,960 boys born was named Rosario. FALLING Recent data shows the name is currently falling.