Boys' name · since 1922
Koji
Koji has 645 recorded births since 1922 in federal Social Security data, most heavily in 2025 -- full year-by-year trend, decade aggregates, and state rankings follow.
- #6,779 of 45,481
- all-time among boys
- #3,392 of 13,930
- 2025 SSA year
- 645
- born since 1922
- 2010s
- peak decade
Yes -- Koji is the #3392 most popular boys' name in the U.S. today, with 645 recorded since 1922.
Koji has 645 recorded births among boys since 1922, per the U.S. Social Security Administration, ranked #3392 as of the latest data, more common than 76% of boys, busiest in the 2010s -- see the year-by-year trends, decade totals, and state-level distribution below, all drawn directly from SSA birth-registration files spanning 1922 to 2025.
- #6,779 of 45,481 all-time among boys
- #3,392 of 13,930 2025 SSA year
- 645 born since 1922
- 2010s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Koji ranks #6,779 of 45,481 boys' names by all-time recorded births (highest first) and #3,392 of 13,930 among boys' names in 2025. 645 born since 1922, peaking in the 2010s.
- #6,779 of 45,481
- all-time among boys
- #3,392 of 13,930
- 2025 SSA year
- 645
- born since 1922
- 2010s
- peak decade
Koji's 645 recorded births place it above 85.09% of the 45,481 boys names in the full SSA archive.
The state file records this name in 3 jurisdictions, led by California.
How Koji compares
645 Top 39% higher than 61% of 13,930 names currently given to boys
Based on all-time total births among currently-ranked boys names. Names with fewer occurrences are grouped into wider buckets on the right.
Source U.S. Social Security Administration, national baby name data
How the numbers stack up
Koji's all-time total is 75% above the median boys name, and Liam still leads by a wide margin.
| Metric | Koji | Median boys name (Takari) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 645 | 369 | 358,536 |
| Peak-year births | 34 | 34 | 22,252 |
Koji's usage pattern, beyond the headline number
Koji splits its recorded history at 2001: 70% of all births land in the more recent half, 30% in the earlier half, a lean toward present-day use rather than a passing spike. The single quietest year was 1922 (5 births) -- compare that against the 2025 peak of 34 for a sense of just how much the name's popularity has swung.
Koji popularity over time
Annual U.S. births registered with the Social Security Administration · 1922–2025
- Peak year (2025)
- 34
- Annual births at peak, across 104 years of records
Koji by decade
2010s is the heaviest window (169 births, 26% of the file).
2010s was Koji's strongest decade.
169 babies received the name during that ten-year window, about 26% of all-time use.
Koji births by decade
Total births in each ten-year window
- 1920s 16
1920s
16 births
- 1970s 27
1970s
27 births
- 1980s 65
1980s
65 births
- 1990s
1990s
73 births
- 2000s
2000s
146 births
- 2010s
2010s
169 births
- 2020s
2020s
149 births
What this shows Peak: 2010s at 169 births (26% of all-time use).
How Koji compares to similarly-sized names
Years in SSA records vs. share of all-time use concentrated in the single peak year, among 15 boys names closest to Koji's total volume
Koji by state
Where Koji concentrates geographically, total births since 1922
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | California | | 142 | 22.0% |
| #2 | Hawaii | | 5 | 0.8% |
| #3 | Washington | | 5 | 0.8% |
142 of 645 births nationwide. Compared to a flat distribution across 3 reporting states.
Frequently Asked Questions
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What to do with Koji's data
- Koji's usage has stayed within range of its 2010s decade-level peak (169 total births) through the 2020s (149) -- a comparatively stable name, not a fading trend.
- California records the most Kojis (142 births) -- see the full state breakdown if geography matters to your decision. California names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Koji
Nearby Names Like Koji
Names with a similar sound, spelling, or feel to Koji
Compare Koji side by side: Koji vs Kojo Koji vs Kojak Koji vs Kojiro
Related Names
Names with a similar popularity rank to Koji
Nationwide names with similar peak year or record span
Two nationwide peer axes for Koji: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~2025)
Similar record span (~103 yrs)
Peak year is the single SSA year with the most births for that name; record span is first-to-latest year in the national files, not a recommendation or shared origin claim.
Data Sources
Data as of August 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1922–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Koji draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.