Total births
342
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.
- #9056
- among boys today
- 342
- born since 1913
- 1910s
- peak decade
- 37%
- more common than other boys
Yes -- Casmir is the #9056 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 #9056 nationally today, ahead of 37% 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.
- #9056 among boys today
- 342 born since 1913
- 1910s peak decade
- 37% more common than other boys
Data updated Jul 2026
The verdict
Casmir is currently the #9056 boys' name in America, more common than 37% of boys - 342 born since 1913, peaking in the 1910s.
- #9056
- among boys today
- 342
- born since 1913
- 1910s
- peak decade
- 37%
- more common than other boys
Casmir vs. every other boys name in current SSA rankings
#9056
of 14,294 boys in use
More common than 37% of names given to boys today.
1910s
Peak decade
34% of everyone ever named Casmir was born in this single decade.
1918
Single peak year
24 babies were named Casmir in 1918 - its busiest year on record.
How Casmir compares
342 49th percentile among 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
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 (Elchonon) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 342 | 367 | 358,536 |
| Peak-year births | 24 | 23 | 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 at a glance
Outside the top 1,000Peak year
1918
Current rank
#9,056
Active since
1913
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
Total births in each ten-year window, peak vs trough at a glance
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% |
Pennsylvania share of Casmir's total US births 4.7%
Even split
16 of 342 births nationwide. Compared to a flat distribution across 4 reporting states.
Frequently Asked Questions
How popular is the name Casmir? ▼
Casmir has been given to 342 babies in the U.S. since 1913, according to SSA data. Among boys, it ranks #9056 as of the latest data. 24 babies were born in 1918, its single highest year.
When was Casmir most popular? ▼
Casmir was most popular in the 1910s decade with 117 total births. The single peak year was 1918.
Where is Casmir most popular? ▼
The top states for the name Casmir are Pennsylvania (16 births), Illinois (5 births), Michigan (5 births).
How long has the name Casmir been used? ▼
Casmir has been recorded in Social Security data since 1913, spanning 113 years of data through 2025.
What names are similar to Casmir? ▼
Names with a similar sound or spelling include Casey, Cash, Cason, Case, and 4 more. These share a common prefix and are also used for boys.
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
- 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 Casmir
Nearby Names Like Casmir
Names with a similar sound, spelling, or feel to Casmir
Casey Boy
#311 116,675 births
Cash Boy
#316 27,705 births
Cason Boy
#856 11,308 births
Case Boy
#724 9,926 births
Cassius Boy
#569 9,736 births
Compare Casmir side by side: Casmir vs Casey Casmir vs Cash Casmir vs Cason
Related Names
Names with a similar popularity rank to Casmir
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, 1913–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Casmir: #9056 Boys' Name - 342 Births, Peak 1918." NameAlmanac. Accessed via https://namealmanac.com/name/casmir. 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 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 July 2026.