Total births
5,714
Boys' name · since 1880
Isadore
Since 1880, U.S. Social Security records show 5,714 babies named Isadore, peaking in 1916. See the year-by-year trend, decade totals, and state rankings below, sourced from federal birth data.
- #8318
- among boys today
- 5,714
- born since 1880
- 1910s
- peak decade
- 42%
- more common than other boys
5,714 babies have been named Isadore since 1880, making it today's #8318 boys' name.
Social Security Administration records show Isadore recorded 5,714 times among boys since 1880, holding rank #8318 nationally today, ahead of 42% of boys, peaking in the 1910s. This profile derives year-by-year birth trends, decade totals, and state-level distribution directly from SSA birth-registration files spanning 1880 to 2025.
- #8318 among boys today
- 5,714 born since 1880
- 1910s peak decade
- 42% more common than other boys
Data updated Jun 2026
The verdict
Isadore is currently the #8318 boys' name in America, more common than 42% of boys - 5,714 born since 1880, peaking in the 1910s.
- #8318
- among boys today
- 5,714
- born since 1880
- 1910s
- peak decade
- 42%
- more common than other boys
Isadore vs. every other boys name in current SSA rankings
#8318
of 14,294 boys in use
More common than 42% of names given to boys today.
1910s
Peak decade
35% of everyone ever named Isadore was born in this single decade.
1916
Single peak year
273 babies were named Isadore in 1916 - its busiest year on record.
How Isadore compares
5,714 Top 11% higher than 89% 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
Isadore's all-time total is 16x the median boys name, and Liam still leads by a wide margin.
| Metric | Isadore | Median boys name (Elchonon) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 5,714 | 367 | 358,536 |
| Peak-year births | 273 | 23 | 22,252 |
Isadore's usage pattern, beyond the headline number
Isadore splits its recorded history at 1951: 17% of all births land in the more recent half, 83% in the earlier half, leaning more toward its earlier era than today's. The single quietest year was 1882 (5 births) -- compare that against the 1916 peak of 273 for a sense of just how much the name's popularity has swung.
Isadore at a glance
Outside the top 1,000Peak year
1916
Current rank
#8,318
Active since
1880
Isadore popularity over time - boys
Annual U.S. births registered with the Social Security Administration · 1880–2025
- Peak year (1916)
- 273
- Annual births at peak, across 146 years of records
Isadore popularity over time - girls
195 total births recorded since 1885 (Isadore as girls' name)
Isadore by decade
Total births in each ten-year window, peak vs trough at a glance
1910s was Isadore's strongest decade.
1,980 babies received the name during that ten-year window, about 35% of all-time use.
Isadore births by decade
Total births in each ten-year window
- 1880s 93
1880s
93 births
- 1890s 174
1890s
174 births
- 1900s 350
1900s
350 births
- 1910s
1910s
1,980 births
- 1920s
1920s
1,364 births
- 1930s 443
1930s
443 births
- 1940s 295
1940s
295 births
- 1950s 271
1950s
271 births
- 1960s 170
1960s
170 births
- 1970s 131
1970s
131 births
- 1980s 90
1980s
90 births
- 1990s 82
1990s
82 births
- 2000s 92
2000s
92 births
- 2010s 95
2010s
95 births
- 2020s 84
2020s
84 births
What this shows Peak: 1910s at 1,980 births (35% of all-time use).
How Isadore 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 Isadore's total volume
Isadore vs 15 similarly-sized boys names
Isadore by state
Where Isadore concentrates geographically, total births since 1880
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Pennsylvania | | 674 | 11.8% |
| #2 | New York | | 657 | 11.5% |
| #3 | Illinois | | 258 | 4.5% |
| #4 | New Jersey | | 187 | 3.3% |
| #5 | Massachusetts | | 179 | 3.1% |
| #6 | Michigan | | 142 | 2.5% |
| #7 | Ohio | | 129 | 2.3% |
| #8 | Louisiana | | 88 | 1.5% |
Pennsylvania share of Isadore's total US births 11.8%
Even split
674 of 5,714 births nationwide. Compared to a flat distribution across 21 reporting states.
Isadore appears in 21 states. Explore state details →
Frequently Asked Questions
How popular is the name Isadore? ▼
Since 1880, Social Security records show 5,714 babies named Isadore. Today it holds rank #8318 among boys. Its busiest year on record was 1916, with 273 births.
When was Isadore most popular? ▼
Isadore was most popular in the 1910s decade with 1,980 total births. The single peak year was 1916.
Where is Isadore most popular? ▼
The top states for the name Isadore are Pennsylvania (674 births), New York (657 births), Illinois (258 births).
How long has the name Isadore been used? ▼
Records for Isadore go back to 1880, giving 146 years of history through 2025.
What names are similar to Isadore? ▼
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 Isadore's data
- Isadore's decade-level peak was the 1910s (1,980 total births); usage has since declined to 84 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Pennsylvania records the most Isadores (674 births) -- see the full state breakdown if geography matters to your decision. Pennsylvania 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 Isadore
Nearby Names Like Isadore
Names with a similar sound, spelling, or feel to Isadore
Isaac Boy
#41 331,508 births
Isaiah Boy
#56 254,020 births
Isaias Boy
#449 18,644 births
Isai Boy
#1063 7,340 births
Isaak Boy
#2408 4,271 births
Compare Isadore side by side: Isadore vs Isaac Isadore vs Isaiah Isadore vs Isaias
Related Names
Names with a similar popularity rank to Isadore
Data Sources
Data as of June 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, 1880–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Isadore: #8318 Boys' Name - 5,714 Births, Peak 1916." NameAlmanac. Accessed via https://namealmanac.com/name/isadore. 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 Isadore 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 June 2026.