Koi
- Gender
- Unisex
- Say it
- KOY
- Origin
- Japanese
- US rank, 2025
- #2,194 for girls
Unisex
Koi is a name of Japanese origin, meaning “carp”. In 2025 it ranked 2,194th for girls in the US (84 babies).
What does Koi mean?
Japanese: Japanese word for carp
“carp”
Koi are ornamental carp prized in Japan; a different Japanese word pronounced koi means love.
Is Koi a girl's or a boy's name?
In recent years, Koi has been given to both girls and boys. In 2025, it was given to 84 girls and 40 boys in the US.
How popular is Koi in the US?
- Rank in 2025
- #2,194among girls
- Babies in 2025
- 84about 1 in 19,000 girls
- Five-year trend
- Rising fastup 112% in five years
- Same name in a class
- under 1%chance among 15 girls
In 2025, 84 girls in the US were named Koi, making it the 2,194th most popular name for girls. Five years earlier, in 2020, it was 4,077th. It first appears in the records in 1999. 40 boys were also named Koi in 2025 (3,035th for boys).
2025 had the most girls named Koi of any year since it first appeared, in 1999.
Half of all the girls named Koi in the US since 1880 were born between 2014 and 2023, the years shaded on the chart below.
In 2025, 102 girls in the US were given Koi or a name that sounds the same. With every name's spellings counted this way, that ranks #1,669, up from #2,194 for this spelling alone.
- Koi 84
- Coi 18
In 2006, 44% of the babies named Koi in the US were girls. By 2025 it was 68%, with more girls than boys since 2023.
Koi in the US, year by year
| Year | Girls | Rank |
|---|---|---|
| 2025 | 84 | #2,194 |
| 2024 | 54 | #3,013 |
| 2023 | 72 | #2,466 |
| 2022 | 43 | #3,593 |
| 2021 | 66 | #2,608 |
| 2020 | 34 | #4,077 |
| 2019 | 33 | #4,259 |
| 2018 | 32 | #4,356 |
| 2017 | 25 | #5,189 |
| 2016 | 19 | #6,398 |
| 2015 | 18 | #6,719 |
| 2014 | 22 | #5,795 |
| 2013 | 26 | #5,141 |
| 2012 | 15 | #7,800 |
| 2011 | 14 | #8,192 |
| 2010 | 20 | #6,380 |
| 2009 | 10 | #10,675 |
| 2008 | 13 | #8,961 |
| 2007 | 11 | #10,125 |
| 2006 | 15 | #7,865 |
| 2005 | 7 | #13,003 |
| 2004 | 6 | #14,172 |
| 2003 | 9 | #10,420 |
| 2002 | 9 | #10,240 |
| 2001 | 7 | #12,049 |
| 2000 | 0 | – |
| 1999 | 5 | #14,403 |
Names like Koi
Names given in the same years and the same naming tradition, with a similar sound.
Tru Miyori Kyomi Yumi Kiyomi Rumi Yuna Yuri Kaori Xuri Suki Saori
Other spellings of Koi
Names related to Koi
More Japanese names
Kobe Kaizen Raiden Ren Akari Kenzo Ronin Akira Emi Kairi Miya Kenji Reo Jiraiya Aizen Sora
Sources
Figures from Popular Baby Names (US Social Security Administration). Nameling last updated them on 20 October 2026. How the figures are worked out, and the data to download.
To cite this page: Nameling, “Koi: name meaning, origin and popularity”, https://www.nameling.co.uk/names/koi, updated 20 October 2026.