Koji
Boy name · #3392 in 2025 · Uniqueness 47/100
In 2025, 34 baby boys were named Koji, placing it at #3392 in the official national rankings. A decade ago it stood at #5289, so the name has been rising over the past ten years. Roughly one in every 52,941 boys born in 2025 was named Koji.
The 103-year story
Koji first appears in the Social Security records in 1922, when 5 boys received the name. Its all-time peak is essentially right now: 2025, with 34 babies and a rank of #3379. Names at their peak can keep climbing — or be one trend cycle from the long slide that eventually hits most popular names. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Babies named Koji per year, 1880–2025. Source: SSA.
Unlock the 5-year forecast and compare Koji against up to 5 other names.
Uniqueness: will there be another Koji in class?
Koji scores 47 out of 100 on our uniqueness scale, which blends current rarity with five-year momentum — putting it in the "distinctive" band. That middle band is the sweet spot many parents hunt for: recognizable without being everywhere.
Where Koji is most common
State-level data for Koji is sparse in 2025 — the name's footprint is too small for most states to report (the SSA suppresses counts under 5 per state for privacy).
Names like Koji
Statistically, parents drawn to Koji tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Khoi, Kavi, Kanai, Kazi, and Rafi.
KhoiKaviKanaiKaziRafiKoiDaniKairi
Rank history (last 25 years)
| Year | Babies named Koji | Rank |
|---|---|---|
| 2025 | 34 | #3379 |
| 2024 | 25 | #4200 |
| 2023 | 33 | #3474 |
| 2022 | 26 | #4089 |
| 2021 | 19 | #4936 |
| 2020 | 12 | #6620 |
| 2019 | 15 | #5813 |
| 2018 | 14 | #6036 |
| 2017 | 13 | #6338 |
| 2016 | 28 | #3776 |
| 2015 | 17 | #5289 |
| 2014 | 15 | #5733 |
| 2013 | 18 | #4981 |
| 2012 | 14 | #6001 |
| 2011 | 14 | #5945 |
| 2010 | 21 | #4517 |
| 2009 | 15 | #5800 |
| 2008 | 21 | #4540 |
| 2007 | 17 | #5210 |
| 2006 | 11 | #6904 |
| 2005 | 18 | #4631 |
| 2004 | 13 | #5813 |
| 2003 | 14 | #5271 |
| 2002 | 13 | #5395 |
| 2001 | 10 | #6445 |
Frequently asked questions
Is Koji a popular boy name?
Koji ranked #3392 among boys in 2025 with 34 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #5289.
When was the name Koji most popular?
Koji peaked in 2025, when 34 American boys received the name (ranked #3379 that year). That peak is current — the name is at or near its all-time high right now.
How rare is the name Koji?
In 2025, roughly 1 in 52,941 newborn American boys was named Koji. It scores 47/100 on our uniqueness scale (rarity blended with momentum), which we classify as "distinctive".
Data source: U.S. Social Security Administration name statistics, 1880–2025, national and state files. Counts reflect Social Security card applications; names with fewer than 5 occurrences in a state-year are suppressed by the SSA.