Ko is a distinctive boys' name in United States, ranking #10138 in 2020 with 7 recorded births. This places Ko in the bottom 28% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2016 with 8 births ranking #9326. In 2020, approximately 1 in every 246,438 boys born was named Ko. RISING Recent data shows the name is currently rising.