Koen has been given to about 5,190 people in the United States since 1880. It was most common in 2023, which makes it a current name.
Koen ranks 623rd among American boys in 2025, with 453 born that year. Its best year was 2023, when 468 babies were given the name, ranking 606th. The typical living American called Koen is about 10 years old today. It is relatively most common in Hawaii, where it accounts for 0.16% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.