Meaning not yet researched.
Koi: US girls given the name each year, 1880 to 2025, from Social Security card applications. 84 in 2025. Its best rank was #2,207 in 2025.
US births per year · SSA card applications
Its highest rank in 146 years of records is this year’s. About 68% of babies named Koi in 2025 were girls.
Baby name · US data 1880–2025
#2,207 for US girls in 2025, its highest rank in 146 years of records.
Hover, tap or use the arrow keys for any year. Years with fewer than five babies of a sex are not published by SSA and show as zero.
Koi: US girls and boys given the name each year from 1880 to 2025. 84 girls in 2025. Peak: #2,207 in 2025 · most girls in one year: 84 (2025).
In 2025, 84 US girls were named Koi, making it the 2,207th most common girls’ name of the year, up 827 places from #3,034 in 2024. That is 30 more than the 54 girls named Koi in 2024. Its best rank for girls was #2,207, reached in this year, 2025. That year also had the most girls given the name: 84. For comparison, it was #6,864 in 2015 and unranked in 1950.
In 2025, 40 US boys were named Koi, making it the 3,061st most common boys’ name of the year, down 368 places from #2,693 in 2024. That is 9 fewer than the 49 boys named Koi in 2024. Its best rank for boys was #2,259, reached in 2022. That year also had the most boys given the name: 64. For comparison, it was #4,480 in 2015 and unranked in 1950.
Social Security card records list Koi in 30 years of the 146 from 1880 to 2025, starting in 1995 with 7 babies. In all, 1,482 US babies have been given the name, 45% of them girls and 55% boys. Its busiest decade was the 2020s, with 661 babies named Koi.
Over the 10 years from 2016 to 2025, 462 US girls were named Koi; the busiest of those years was 2025, with 84. In 2025 that was about 1 in 19,134 of the girls in SSA’s list for the year.
Among the states, Koi ranked highest in Virginia in 2025, at #899 for girls there. It was not in the top 100 of any state. Related spellings in the SSA files include Coy (18,214 babies since 1880), Koa (8,548 babies since 1880), Koah (1,438 babies since 1880) and Koe (565 babies since 1880). Rarer spellings such as Kohei and Qui are summarised on this page.
Meaning not yet researched.
We publish a meaning only with a cited source and a confidence label, and never generate one. Meanings are being researched for the most common names first.
Rare spellings summarised here: Kohei (147), Qui (23).
Numbers are all-time US births. Links come from Wikidata’s “said to be the same as” (P460, CC0) and our spelling rule: at most two letters different, with the same sound pattern.
No nicknames listed for Koi in the open dataset we use.
Source: carltonnorthern/nicknames (Apache-2.0).
US girls. Rank within each state. SSA leaves out states where fewer than five girls got the name, so 46 are not listed.
| State | Births 2025 | Rank 2025 | Rank 2015 |
|---|---|---|---|
| Virginia | 8 | #899 | — |
| Georgia | 10 | #955 | — |
| Florida | 13 | #1,151 | — |
| North Carolina | 5 | #1,582 | — |
| Texas | 13 | #1,755 | — |
Births and national rank for each year SSA lists the name, newest first.
| Year | Girls | Girls rank | Boys | Boys rank |
|---|---|---|---|---|
| 2025 | 84 | #2,207 | 40 | #3,061 |
| 2024 | 54 | #3,034 | 49 | #2,693 |
| 2023 | 72 | #2,479 | 55 | #2,460 |
| 2022 | 43 | #3,626 | 64 | #2,259 |
| 2021 | 66 | #2,621 | 53 | #2,516 |
| 2020 | 34 | #4,123 | 47 | #2,678 |
| 2019 | 33 | #4,303 | 39 | #3,080 |
| 2018 | 32 | #4,407 | 34 | #3,338 |
| 2017 | 25 | #5,257 | 26 | #4,046 |
| 2016 | 19 | #6,557 | 27 | #3,935 |
| 2015 | 18 | #6,864 | 22 | #4,480 |
| 2014 | 22 | #5,897 | 34 | #3,274 |
| 2013 | 26 | #5,225 | 34 | #3,240 |
| 2012 | 15 | #8,039 | 25 | #4,081 |
| 2011 | 14 | #8,434 | 40 | #2,933 |
| 2010 | 20 | #6,523 | 34 | #3,278 |
| 2009 | 10 | #11,112 | 20 | #4,850 |
| 2008 | 13 | #9,270 | 25 | #4,095 |
| 2007 | 11 | #10,508 | 17 | #5,332 |
| 2006 | 15 | #8,066 | 19 | #4,788 |
| 2005 | 7 | #13,790 | 15 | #5,453 |
| 2004 | 6 | #15,181 | 14 | #5,656 |
| 2003 | 9 | #10,897 | 12 | #6,086 |
| 2002 | 9 | #10,692 | 14 | #5,281 |
| 2001 | 7 | #12,797 | 12 | #5,878 |
| 2000 | — | — | 9 | #7,148 |
| 1999 | 5 | #15,713 | 8 | #7,548 |
| 1997 | — | — | 10 | #5,900 |
| 1996 | — | — | 8 | #6,847 |
| 1995 | — | — | 7 | #7,437 |
About the data: counts are Social Security card applications for US births, for names given to at least five babies of a sex in a year (SSA, names.zip, public domain). Ranks follow SSA’s own order: most births first, ties alphabetical. Files retrieved 2026-10-05 (checksum on our sources page).