Rosario is a distinctive boys' name in United States, ranking #5933 in 2014 with 15 recorded births. The name reached its all-time peak in 1999 with 41 births ranking #2257. Since 1996, the popularity has decreased by 59.5%. In 2014, approximately 1 in every 128,029 boys born was named Rosario. FALLING Recent data shows the name is currently falling.