Total births
3,421
Boys' name · since 1881
Isidore
Since 1881, U.S. Social Security records show 3,421 babies named Isidore, peaking in 1919. See the year-by-year trend, decade totals, and state rankings below, sourced from federal birth data.
- #3456
- among boys today
- 3,421
- born since 1881
- 1910s
- peak decade
- 76%
- more common than other boys
Isidore currently ranks #3456 among boys' names in America, with 3,421 babies recorded since 1881.
Social Security Administration records show Isidore recorded 3,421 times among boys since 1881, holding rank #3456 nationally today, ahead of 76% 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 1881 to 2025.
- #3456 among boys today
- 3,421 born since 1881
- 1910s peak decade
- 76% more common than other boys
Data updated Jun 2026
The verdict
Isidore is currently the #3456 boys' name in America, more common than 76% of boys - 3,421 born since 1881, peaking in the 1910s.
- #3456
- among boys today
- 3,421
- born since 1881
- 1910s
- peak decade
- 76%
- more common than other boys
Isidore vs. every other boys name in current SSA rankings
#3456
of 14,294 boys in use
More common than 76% of names given to boys today.
1910s
Peak decade
40% of everyone ever named Isidore was born in this single decade.
1919
Single peak year
183 babies were named Isidore in 1919 - its busiest year on record.
How Isidore compares
3,421 Top 15% higher than 85% 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
Isidore's all-time total is 9x the median boys name, and Liam still leads by a wide margin.
| Metric | Isidore | Median boys name (Elchonon) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 3,421 | 367 | 358,536 |
| Peak-year births | 183 | 23 | 22,252 |
Isidore's usage pattern, beyond the headline number
Splitting Isidore's full recorded timeline at 1946, 21% of its total births fall in the more recent half of the record versus 79% in the earlier half -- the name was more prevalent in its earlier era than it is today. Its quietest year on record was 1882, with just 5 recorded births -- worth weighing against the 1919 peak of 183 to see the full range of the name's swing in popularity.
Isidore at a glance
Outside the top 1,000Peak year
1919
Current rank
#3,456
Active since
1881
Isidore popularity over time
Annual U.S. births registered with the Social Security Administration · 1881–2025
- Peak year (1919)
- 183
- Annual births at peak, across 145 years of records
Isidore by decade
Total births in each ten-year window, peak vs trough at a glance
1910s was Isidore's strongest decade.
1,357 babies received the name during that ten-year window, about 40% of all-time use.
Isidore births by decade
Total births in each ten-year window
- 1880s 39
1880s
39 births
- 1890s 72
1890s
72 births
- 1900s 159
1900s
159 births
- 1910s
1910s
1,357 births
- 1920s
1920s
849 births
- 1930s 180
1930s
180 births
- 1940s 101
1940s
101 births
- 1950s 135
1950s
135 births
- 1960s 98
1960s
98 births
- 1970s 31
1970s
31 births
- 1980s 20
1980s
20 births
- 1990s 30
1990s
30 births
- 2000s 64
2000s
64 births
- 2010s 130
2010s
130 births
- 2020s 156
2020s
156 births
What this shows Peak: 1910s at 1,357 births (40% of all-time use).
How Isidore 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 Isidore's total volume
Isidore vs 15 similarly-sized boys names
Isidore by state
Where Isidore concentrates geographically, total births since 1881
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | New York | | 1,861 | 54.4% |
| #2 | Pennsylvania | | 36 | 1.1% |
| #3 | Massachusetts | | 6 | 0.2% |
| #4 | Maryland | | 5 | 0.1% |
| #5 | Texas | | 5 | 0.1% |
New York share of Isidore's total US births 54.4%
Even split
1,861 of 3,421 births nationwide. Compared to a flat distribution across 5 reporting states.
Frequently Asked Questions
How popular is the name Isidore? ▼
Since 1881, Social Security records show 3,421 babies named Isidore. Today it holds rank #3456 among boys. Its busiest year on record was 1919, with 183 births.
When was Isidore most popular? ▼
Isidore was most popular in the 1910s decade with 1,357 total births. The single peak year was 1919.
Where is Isidore most popular? ▼
The top states for the name Isidore are New York (1,861 births), Pennsylvania (36 births), Massachusetts (6 births).
How long has the name Isidore been used? ▼
Records for Isidore go back to 1881, giving 145 years of history through 2025.
What names are similar to Isidore? ▼
Names with a similar sound or spelling include Isiah, Isidro, Isidoro, Isidor, and 4 more. These share a common prefix and are also used for boys.
What to do with Isidore's data
- Isidore's decade-level peak was the 1910s (1,357 total births); usage has since declined to 156 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- New York records the most Isidores (1,861 births) -- see the full state breakdown if geography matters to your decision. New York 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 Isidore
Nearby Names Like Isidore
Names with a similar sound, spelling, or feel to Isidore
Isiah Boy
#1309 24,710 births
Isidro Boy
#1755 8,211 births
Isidoro Boy
1,292 births
Isidor Boy
#9014 419 births
Isiaha Boy
352 births
Compare Isidore side by side: Isidore vs Isiah Isidore vs Isidro Isidore vs Isidoro
Related Names
Names with a similar popularity rank to Isidore
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, 1881–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Isidore: #3456 Boys' Name - 3,421 Births, Peak 1919." NameAlmanac. Accessed via https://namealmanac.com/name/isidore. 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 Isidore 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.