Total births
246
Boys' name · since 1915
Isao
Isao has 246 recorded births since 1915 in federal Social Security data, most heavily in 1925 -- full year-by-year trend, decade aggregates, and state rankings follow.
- 246
- total births
- 1915–2016
- years on record
- 1920s
- peak decade
- 52%
- born in that decade
Isao sits outside today's top ranks for boys, with 246 recorded since 1915.
Social Security Administration records show Isao recorded 246 times among boys since 1915, though it doesn't currently rank among the most-used boys names, peaking in the 1920s. This profile derives year-by-year birth trends, decade totals, and state-level distribution directly from SSA birth-registration files spanning 1915 to 2016.
- 246 total births
- 1915–2016 years on record
- 1920s peak decade
- 52% born in that decade
Data updated Jul 2026
The verdict
246 boys have been named Isao since 1915, peaking in the 1920s, last recorded in 2016.
- 246
- total births
- 1915–2016
- years on record
- 1920s
- peak decade
- 52%
- born in that decade
1920s
Peak decade
52% of everyone ever named Isao was born in this single decade.
1925
Single peak year
20 babies were named Isao in 1925 - its busiest year on record.
Isao's usage pattern, beyond the headline number
Divide Isao's SSA record in two at 1926 and the more recent half accounts for 36% of all births, the earlier half the remaining 64%, consistent with a name more common in the past than in recent years. Its calmest year was 1934, with only 5 births recorded -- set against the 1925 peak of 20, that's the full swing in one name's fortunes.
Isao at a glance
Last recorded 2016Peak year
1925
Current rank
Unranked
Active since
1915
Isao popularity over time
Annual U.S. births registered with the Social Security Administration · 1915–2016
- Peak year (1925)
- 20
- Annual births at peak, across 102 years of records
Isao by decade
Total births in each ten-year window, peak vs trough at a glance
1920s was Isao's strongest decade.
128 babies received the name during that ten-year window, about 52% of all-time use.
Isao births by decade
Total births in each ten-year window
- 1910s
1910s
70 births
- 1920s
1920s
128 births
- 1930s 38
1930s
38 births
- 1940s 5
1940s
5 births
- 2010s 5
2010s
5 births
What this shows Peak: 1920s at 128 births (52% of all-time use).
Isao by state
Where Isao concentrates geographically, total births since 1915
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Hawaii | | 87 | 35.4% |
| #2 | California | | 59 | 24.0% |
Hawaii share of Isao's total US births 35.4%
Even split
87 of 246 births nationwide. Compared to a flat distribution across 2 reporting states.
Frequently Asked Questions
How popular is the name Isao? ▼
246 babies have been named Isao since 1915. It was last recorded in 2016. The peak year was 1925 with 20 births.
When was Isao most popular? ▼
Isao was most popular in the 1920s decade with 128 total births. The single peak year was 1925.
Where is Isao most popular? ▼
The top states for the name Isao are Hawaii (87 births), California (59 births).
How long has the name Isao been used? ▼
Records for Isao go back to 1915, giving 102 years of history through 2016.
What names are similar to Isao? ▼
Names with a similar sound or spelling include Isaac, Isaiah, Isaias, Isai, and 4 more. These share a common prefix and are also used for boys.
What to do with Isao's data
- Isao's decade-level peak was the 1920s (128 total births); usage has since declined to 5 in the 2010s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Hawaii records the most Isaos (87 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 Isao
Nearby Names Like Isao
Names with a similar sound, spelling, or feel to Isao
Isaac Boy
#41 331,508 births
Isaiah Boy
#56 254,020 births
Isaias Boy
#449 18,644 births
Isai Boy
#1063 7,340 births
Isadore Boy
#8318 5,714 births
Compare Isao side by side: Isao vs Isaac Isao vs Isaiah Isao vs Isaias
Related Names
Names with a similar number of total births
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, 1915–2016 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Isao: Baby Name Since 1915 - 246 Births, Peak 1925." NameAlmanac. Accessed via https://namealmanac.com/name/isao. 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 Isao 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.