Koi is a distinctive boys' name in United States, ranking #5878 in 2001 with 12 recorded births. This places Koi in the top 48% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2022 with 64 births ranking #2259. Since 1996, the popularity has increased by 50.0%. In 2001, approximately 1 in every 161,903 boys born was named Koi. FALLING Recent data shows the name is currently falling.