Boys' name · since 1914
Koichi
145 babies named Koichi in U.S. Social Security records since 1914, with the highest year being 1921. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- #14,979 of 45,481
- all-time among boys
- 145
- born since 1914
- 1920s
- peak decade
145 boys have been named Koichi since 1914, though it isn't currently a top-ranked name.
According to the U.S. Social Security Administration, Koichi has been recorded 145 times among boys since 1914, though it is not among the currently most-used boys names, with its heaviest use in the 1920s. This profile covers year-by-year birth trends, decade totals, and state-level distribution, all derived directly from SSA birth-registration files spanning 1914 to 2007.
- #14,979 of 45,481 all-time among boys
- 145 born since 1914
- 1920s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Koichi ranks #14,979 of 45,481 boys' names by all-time recorded births (highest first). 145 born since 1914, peaking in the 1920s.
- #14,979 of 45,481
- all-time among boys
- 145
- born since 1914
- 1920s
- peak decade
Koichi's 145 recorded births place it above 67.02% of the 45,481 boys names in the full SSA archive.
The state file records this name in 2 jurisdictions, led by Hawaii.
Koichi's usage pattern, beyond the headline number
Splitting Koichi's full recorded timeline at 1924, 40% of its total births fall in the more recent half of the record versus 60% in the earlier half -- the name was more prevalent in its earlier era than it is today. Its quietest year on record was 1914, with just 5 recorded births -- worth weighing against the 1921 peak of 16 to see the full range of the name's swing in popularity.
Koichi popularity over time
Annual U.S. births registered with the Social Security Administration · 1914–2007
- Peak year (1921)
- 16
- Annual births at peak, across 94 years of records
Koichi by decade
1920s is the heaviest window (81 births, 56% of the file).
1920s was Koichi's strongest decade.
81 babies received the name during that ten-year window, about 56% of all-time use.
Koichi births by decade
Total births in each ten-year window
- 1910s
1910s
42 births
- 1920s
1920s
81 births
- 1930s 6
1930s
6 births
- 1980s 6
1980s
6 births
- 1990s 5
1990s
5 births
- 2000s 5
2000s
5 births
What this shows Peak: 1920s at 81 births (56% of all-time use).
Koichi by state
Where Koichi concentrates geographically, total births since 1914
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Hawaii | | 66 | 45.5% |
| #2 | Washington | | 5 | 3.4% |
66 of 145 births nationwide. Compared to a flat distribution across 2 reporting states.
Frequently Asked Questions
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What to do with Koichi's data
- Koichi's decade-level peak was the 1920s (81 total births); usage has since declined to 5 in the 2000s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Hawaii records the most Koichis (66 births) -- see the full state breakdown if geography matters to your decision. Hawaii names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Koichi
Nearby Names Like Koichi
Names with a similar sound, spelling, or feel to Koichi
Compare Koichi side by side: Koichi vs Koi
Related Names
Names with a similar number of total births
Nationwide names with similar peak year or record span
Two nationwide peer axes for Koichi: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1921)
Similar record span (~93 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, 1914–2007 (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 Koichi 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.