Boys' name · since 1914
Seiji
Since 1914, U.S. Social Security records show 517 babies named Seiji, peaking in 2007. See the year-by-year trend, decade totals, and state rankings below, sourced from federal birth data.
- #7,751 of 45,481
- all-time among boys
- #8,980 of 13,930
- 2025 SSA year
- 517
- born since 1914
- 2000s
- peak decade
Seiji currently ranks #8980 among boys' names in America, with 517 babies recorded since 1914.
Seiji has 517 recorded births among boys since 1914, per the U.S. Social Security Administration, ranked #8980 as of the latest data, more common than 36% of boys, busiest in the 2000s -- see the year-by-year trends, decade totals, and state-level distribution below, all drawn directly from SSA birth-registration files spanning 1914 to 2025.
- #7,751 of 45,481 all-time among boys
- #8,980 of 13,930 2025 SSA year
- 517 born since 1914
- 2000s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Seiji ranks #7,751 of 45,481 boys' names by all-time recorded births (highest first) and #8,980 of 13,930 among boys' names in 2025. 517 born since 1914, peaking in the 2000s.
- #7,751 of 45,481
- all-time among boys
- #8,980 of 13,930
- 2025 SSA year
- 517
- born since 1914
- 2000s
- peak decade
Seiji's 517 recorded births place it above 82.95% of the 45,481 boys names in the full SSA archive.
The state file records this name in 2 jurisdictions, led by Hawaii.
How Seiji compares
517 Top 44% higher than 56% 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
Seiji's all-time total is 40% above the median boys name, and Liam still leads by a wide margin.
| Metric | Seiji | Median boys name (Takari) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 517 | 369 | 358,536 |
| Peak-year births | 19 | 34 | 22,252 |
Seiji's usage pattern, beyond the headline number
Divide Seiji's SSA record in two at 1996 and the more recent half accounts for 60% of all births, the earlier half the remaining 40%, consistent with a name still gaining ground rather than fading. Its calmest year was 1917, with only 5 births recorded -- set against the 2007 peak of 19, that's the full swing in one name's fortunes.
Seiji popularity over time
Annual U.S. births registered with the Social Security Administration · 1914–2025
- Peak year (2007)
- 19
- Annual births at peak, across 112 years of records
Seiji by decade
2000s is the heaviest window (116 births, 22% of the file).
2000s was Seiji's strongest decade.
116 babies received the name during that ten-year window, about 22% of all-time use.
Seiji births by decade
Total births in each ten-year window
- 1910s 16
1910s
16 births
- 1920s
1920s
74 births
- 1930s 22
1930s
22 births
- 1970s 28
1970s
28 births
- 1980s 31
1980s
31 births
- 1990s
1990s
75 births
- 2000s
2000s
116 births
- 2010s
2010s
106 births
- 2020s
2020s
49 births
What this shows Peak: 2000s at 116 births (22% of all-time use).
How Seiji 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 Seiji's total volume
Seiji by state
Where Seiji concentrates geographically, total births since 1914
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Hawaii | | 32 | 6.2% |
| #2 | California | | 30 | 5.8% |
32 of 517 births nationwide. Compared to a flat distribution across 2 reporting states.
Frequently Asked Questions
How popular is the name Seiji? ▼
Where does Seiji sit in the SSA name archive? ▼
When was Seiji most popular? ▼
Where is Seiji most popular? ▼
How long has the name Seiji been used? ▼
What names are similar to Seiji? ▼
What to do with Seiji's data
- Seiji's usage has stayed within range of its 2000s decade-level peak (116 total births) through the 2020s (49) -- a comparatively stable name, not a fading trend.
- Hawaii records the most Seijis (32 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 Seiji
Nearby Names Like Seiji
Names with a similar sound, spelling, or feel to Seiji
Compare Seiji side by side: Seiji vs Seif Seiji vs Seichi Seiji vs Seith
Related Names
Names with a similar popularity rank to Seiji
Nationwide names with similar peak year or record span
Two nationwide peer axes for Seiji: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~2007)
Similar record span (~111 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, 1914–2025 (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 Seiji 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.