669births recorded
1Countries
1Variants
2025Peak · United States
#2194United States 2025
Koi is a girl name family recorded 669 times in 1 country since 1999. It ranks highest today in the United States (#2194 in 2025). Its all-time peak was in the United States in 2025, at 3.3 births per 100,000.
Popularity by country
Births per 100,000 newborns, all forms of the name combined.
All forms of Koi
| Variants | Language | Total births | Country | Latest rank | Peak year | 10-year trend |
|---|---|---|---|---|---|---|
| Koi | English | 669 | 🇺🇸 United States | #2194 | 2025 | ▲ 416 % |
Questions about Koi
How popular is the name Koi?
In 2025 it ranked #2194 in the United States. Official registers record 669 births across 1 country.
When was Koi most popular?
It peaked in the United States in 2025, at 3.3 births per 100,000.
Is Koi a boy or a girl name?
In official birth registers, Koi is a girl name.