Boys' name · since 1913
Casmir
342 babies named Casmir in U.S. Social Security records since 1913, with the highest year being 1918. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- #9,875 of 45,481
- all-time among boys
- #10,771 of 13,930
- 2025 SSA year
- 342
- born since 1913
- 1910s
- peak decade
Yes -- Casmir is the #10771 most popular boys' name in the U.S. today, with 342 recorded since 1913.
Social Security Administration records show Casmir recorded 342 times among boys since 1913, holding rank #10771 nationally today, ahead of 23% 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 1913 to 2025.
- #9,875 of 45,481 all-time among boys
- #10,771 of 13,930 2025 SSA year
- 342 born since 1913
- 1910s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Casmir ranks #9,875 of 45,481 boys' names by all-time recorded births (highest first) and #10,771 of 13,930 among boys' names in 2025. 342 born since 1913, peaking in the 1910s.
- #9,875 of 45,481
- all-time among boys
- #10,771 of 13,930
- 2025 SSA year
- 342
- born since 1913
- 1910s
- peak decade
Casmir's 342 recorded births place it above 78.26% of the 45,481 boys names in the full SSA archive.
The state file records this name in 4 jurisdictions, led by Pennsylvania.
How Casmir compares
342 48th percentile among 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
Casmir's all-time total is 7% below the median boys name, and Liam still leads by a wide margin.
| Metric | Casmir | Median boys name (Takari) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 342 | 369 | 358,536 |
| Peak-year births | 24 | 34 | 22,252 |
Casmir's usage pattern, beyond the headline number
Casmir splits its recorded history at 1931: 34% of all births land in the more recent half, 66% in the earlier half, leaning more toward its earlier era than today's. The single quietest year was 1931 (5 births) -- compare that against the 1918 peak of 24 for a sense of just how much the name's popularity has swung.
Casmir popularity over time - boys
Annual U.S. births registered with the Social Security Administration · 1913–2025
- Peak year (1918)
- 24
- Annual births at peak, across 113 years of records
Casmir popularity over time - girls
14 total births recorded since 1994 (Casmir as girls' name)
Casmir by decade
1910s is the heaviest window (117 births, 34% of the file).
1910s was Casmir's strongest decade.
117 babies received the name during that ten-year window, about 34% of all-time use.
Casmir births by decade
Total births in each ten-year window
- 1910s
1910s
117 births
- 1920s
1920s
102 births
- 1930s 36
1930s
36 births
- 1940s 11
1940s
11 births
- 2000s 15
2000s
15 births
- 2010s 11
2010s
11 births
- 2020s
2020s
50 births
What this shows Peak: 1910s at 117 births (34% of all-time use).
Casmir by state
Where Casmir concentrates geographically, total births since 1913
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Pennsylvania | | 16 | 4.7% |
| #2 | Illinois | | 5 | 1.5% |
| #3 | Michigan | | 5 | 1.5% |
| #4 | New York | | 5 | 1.5% |
16 of 342 births nationwide. Compared to a flat distribution across 4 reporting states.
Frequently Asked Questions
How popular is the name Casmir? ▼
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When was Casmir most popular? ▼
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What to do with Casmir's data
- Casmir's usage has stayed within range of its 1910s decade-level peak (117 total births) through the 2020s (50) -- a comparatively stable name, not a fading trend.
- Pennsylvania records the most Casmirs (16 births) -- see the full state breakdown if geography matters to your decision. Pennsylvania names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Casmir
Nearby Names Like Casmir
Names with a similar sound, spelling, or feel to Casmir
Compare Casmir side by side: Casmir vs Casey Casmir vs Cash Casmir vs Cason
Related Names
Names with a similar popularity rank to Casmir
Nationwide names with similar peak year or record span
Two nationwide peer axes for Casmir: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1918)
Similar record span (~112 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, 1913–2025 (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 Casmir 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.