Rosario is a distinctive boys' name in United States, ranking #6307 in 2010 with 14 recorded births. The name reached its all-time peak in 1999 with 41 births ranking #2257. Since 1996, the popularity has decreased by 62.2%. In 2010, approximately 1 in every 137,029 boys born was named Rosario. FALLING Recent data shows the name is currently falling.