In 2025, 147 US boys were named Nikko, making it the 1,319th most common boys’ name of the year, down 37 places from #1,282 in 2024. That is 7 fewer than the 154 boys named Nikko in 2024. Its best rank for boys was #866, reached in 1991. The most boys given the name in a single year was 216, in 2021. For comparison, it was #1,203 in 2015 and unranked in 1950.
Social Security card records list Nikko in 54 years of the 146 from 1880 to 2025, starting in 1970 with 8 babies. In all, 4,702 US babies have been given the name, 3.7% of them girls and 96% boys. Its busiest decade was the 2010s, with 1,397 babies named Nikko.
Over the 10 years from 2016 to 2025, 1,625 US boys were named Nikko; the busiest of those years was 2021, with 216. In 2025 that was about 1 in 11,620 of the boys in SSA’s list for the year.
Among the states, Nikko ranked highest in Colorado in 2025, at #735 for boys there. It was not in the top 100 of any state. Related spellings in the SSA files include Nico (22,322 babies since 1880) and Niko (15,135 babies since 1880).