Boys' name · since 1883
Isidor
419 babies named Isidor in U.S. Social Security records since 1883, with the highest year being 1914. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- #8,780 of 45,481
- all-time among boys
- #9,731 of 13,930
- 2025 SSA year
- 419
- born since 1883
- 1910s
- peak decade
419 babies have been named Isidor since 1883, making it today's #9731 boys' name.
According to the U.S. Social Security Administration, Isidor has been recorded 419 times among boys since 1883, currently ranked #9731 nationally and more common than 30% of boys, with its heaviest use in the 1910s. This profile covers year-by-year birth trends, decade totals, and state-level distribution, all derived directly from SSA birth-registration files spanning 1883 to 2025.
- #8,780 of 45,481 all-time among boys
- #9,731 of 13,930 2025 SSA year
- 419 born since 1883
- 1910s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Isidor ranks #8,780 of 45,481 boys' names by all-time recorded births (highest first) and #9,731 of 13,930 among boys' names in 2025. 419 born since 1883, peaking in the 1910s.
- #8,780 of 45,481
- all-time among boys
- #9,731 of 13,930
- 2025 SSA year
- 419
- born since 1883
- 1910s
- peak decade
Isidor's 419 recorded births place it above 80.68% of the 45,481 boys names in the full SSA archive.
The state file records this name in 1 jurisdictions, led by New York.
How Isidor compares
419 Top 48% higher than 52% 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
Isidor's all-time total is 14% above the median boys name, and Liam still leads by a wide margin.
| Metric | Isidor | Median boys name (Takari) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 419 | 369 | 358,536 |
| Peak-year births | 24 | 34 | 22,252 |
Isidor's usage pattern, beyond the headline number
Splitting Isidor's full recorded timeline at 1921, 40% of its total births fall in the more recent half of the record versus 60% in the earlier half -- the name was more prevalent in its earlier era than it is today. Its quietest year on record was 1888, with just 5 recorded births -- worth weighing against the 1914 peak of 24 to see the full range of the name's swing in popularity.
Isidor popularity over time
Annual U.S. births registered with the Social Security Administration · 1883–2025
- Peak year (1914)
- 24
- Annual births at peak, across 143 years of records
Isidor by decade
1910s is the heaviest window (160 births, 38% of the file).
1910s was Isidor's strongest decade.
160 babies received the name during that ten-year window, about 38% of all-time use.
Isidor births by decade
Total births in each ten-year window
- 1880s 18
1880s
18 births
- 1890s 36
1890s
36 births
- 1900s 22
1900s
22 births
- 1910s
1910s
160 births
- 1920s
1920s
67 births
- 1930s 36
1930s
36 births
- 1940s 6
1940s
6 births
- 1950s 33
1950s
33 births
- 1960s 6
1960s
6 births
- 2010s 5
2010s
5 births
- 2020s 30
2020s
30 births
What this shows Peak: 1910s at 160 births (38% of all-time use).
Isidor by state
Where Isidor concentrates geographically, total births since 1883
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | New York | | 97 | 23.2% |
97 of 419 births nationwide.
Frequently Asked Questions
How popular is the name Isidor? ▼
Where does Isidor sit in the SSA name archive? ▼
When was Isidor most popular? ▼
Where is Isidor most popular? ▼
How long has the name Isidor been used? ▼
What names are similar to Isidor? ▼
What to do with Isidor's data
- Isidor's decade-level peak was the 1910s (160 total births); usage has since declined to 30 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- New York records the most Isidors (97 births) -- see the full state breakdown if geography matters to your decision. New York names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Isidor
Nearby Names Like Isidor
Names with a similar sound, spelling, or feel to Isidor
Compare Isidor side by side: Isidor vs Isiah Isidor vs Isidro Isidor vs Isidore
Related Names
Names with a similar popularity rank to Isidor
Nationwide names with similar peak year or record span
Two nationwide peer axes for Isidor: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1914)
Similar record span (~142 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, 1883–2025 (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 Isidor 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.