Riku is a distinctive boys' name in United States, ranking #6992 in 2007 with 12 recorded births. This places Riku in the top 49% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2024 with 24 births ranking #4391. Since 1996, the popularity has increased by 50.0%. In 2007, approximately 1 in every 172,936 boys born was named Riku. FALLING Recent data shows the name is currently falling.