Riku is a distinctive boys' name in United States, ranking #4396 in 2009 with 23 recorded births. This places Riku in the top 30% 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 187.5%. In 2009, approximately 1 in every 86,231 boys born was named Riku. FALLING Recent data shows the name is currently falling.