Total births
517
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.
- #9068
- among boys today
- 517
- born since 1914
- 2000s
- peak decade
- 37%
- more common than other boys
Seiji currently ranks #9068 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 #9068 as of the latest data, more common than 37% 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.
- #9068 among boys today
- 517 born since 1914
- 2000s peak decade
- 37% more common than other boys
Data updated Jul 2026
The verdict
Seiji is currently the #9068 boys' name in America, more common than 37% of boys - 517 born since 1914, peaking in the 2000s.
- #9068
- among boys today
- 517
- born since 1914
- 2000s
- peak decade
- 37%
- more common than other boys
Seiji vs. every other boys name in current SSA rankings
#9068
of 14,294 boys in use
More common than 37% of names given to boys today.
2000s
Peak decade
22% of everyone ever named Seiji was born in this single decade.
2007
Single peak year
19 babies were named Seiji in 2007 - its busiest year on record.
How Seiji compares
517 Top 43% higher than 57% of 14,294 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 41% above the median boys name, and Liam still leads by a wide margin.
| Metric | Seiji | Median boys name (Elchonon) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 517 | 367 | 358,536 |
| Peak-year births | 19 | 23 | 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 at a glance
Outside the top 1,000Peak year
2007
Current rank
#9,068
Active since
1914
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
Total births in each ten-year window, peak vs trough at a glance
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 vs 15 similarly-sized boys names
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% |
Hawaii share of Seiji's total US births 6.2%
Even split
32 of 517 births nationwide. Compared to a flat distribution across 2 reporting states.
Frequently Asked Questions
How popular is the name Seiji? ▼
Seiji has been given to 517 babies in the U.S. since 1914, according to SSA data. Among boys, it ranks #9068 as of the latest data. 19 babies were born in 2007, its single highest year.
When was Seiji most popular? ▼
Seiji was most popular in the 2000s decade with 116 total births. The single peak year was 2007.
Where is Seiji most popular? ▼
The top states for the name Seiji are Hawaii (32 births), California (30 births).
How long has the name Seiji been used? ▼
Seiji has been recorded in Social Security data since 1914, spanning 112 years of data through 2025.
What names are similar to Seiji? ▼
Names with a similar sound or spelling include Seif, Seichi, Seith, Seiya, and 4 more. These share a common prefix and are also used for boys.
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
- Weighing it against an alternative? Put two names side by side. Compare 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
Seif Boy
#10363 275 births
Seichi Boy
171 births
Seith Boy
125 births
Seiya Boy
#8631 112 births
Seibert Boy
66 births
Compare Seiji side by side: Seiji vs Seif Seiji vs Seichi Seiji vs Seith
Related Names
Names with a similar popularity rank to Seiji
Data Sources
Data as of July 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).
Cite this page
NameAlmanac Editorial. "Seiji: #9068 Boys' Name - 517 Births, Peak 2007." NameAlmanac. Accessed via https://namealmanac.com/name/seiji. Licensed CC BY-SA 4.0.
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 July 2026.