Rocio is a distinctive girls' name in United States, ranking #673 in 1998 with 343 recorded births. This places Rocio in the top 4% of ranked US girls' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 1998 with 343 births ranking #673. In 1998, approximately 1 in every 5,151 girls born was named Rocio. FALLING Recent data shows the name is currently falling.