Boys' name · since 1894
Casimir
Casimir has 5,248 recorded births since 1894 in federal Social Security data, most heavily in 1919 -- full year-by-year trend, decade aggregates, and state rankings follow.
- #1,729 of 45,481
- all-time among boys
- #2,038 of 13,930
- 2025 SSA year
- 5,248
- born since 1894
- 1920s
- peak decade
Yes -- Casimir is the #2038 most popular boys' name in the U.S. today, with 5,248 recorded since 1894.
Social Security Administration records show Casimir recorded 5,248 times among boys since 1894, holding rank #2038 nationally today, ahead of 85% of boys, peaking in the 1920s. This profile derives year-by-year birth trends, decade totals, and state-level distribution directly from SSA birth-registration files spanning 1894 to 2025.
- #1,729 of 45,481 all-time among boys
- #2,038 of 13,930 2025 SSA year
- 5,248 born since 1894
- 1920s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Casimir ranks #1,729 of 45,481 boys' names by all-time recorded births (highest first) and #2,038 of 13,930 among boys' names in 2025. 5,248 born since 1894, peaking in the 1920s.
- #1,729 of 45,481
- all-time among boys
- #2,038 of 13,930
- 2025 SSA year
- 5,248
- born since 1894
- 1920s
- peak decade
Casimir's 5,248 recorded births place it above 96.19% of the 45,481 boys names in the full SSA archive.
17 jurisdictions carry state-level records, led by Illinois.
How Casimir compares
5,248 Top 13% higher than 87% 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
Casimir's all-time total is 14x the median boys name, and Liam still leads by a wide margin.
| Metric | Casimir | Median boys name (Takari) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 5,248 | 369 | 358,536 |
| Peak-year births | 220 | 34 | 22,252 |
Casimir's usage pattern, beyond the headline number
Casimir splits its recorded history at 1960: 25% of all births land in the more recent half, 75% in the earlier half, leaning more toward its earlier era than today's. The single quietest year was 1894 (5 births) -- compare that against the 1919 peak of 220 for a sense of just how much the name's popularity has swung.
Casimir popularity over time
Annual U.S. births registered with the Social Security Administration · 1894–2025
- Peak year (1919)
- 220
- Annual births at peak, across 132 years of records
Casimir by decade
1920s is the heaviest window (1,404 births, 27% of the file).
1920s was Casimir's strongest decade.
1,404 babies received the name during that ten-year window, about 27% of all-time use.
Casimir births by decade
Total births in each ten-year window
- 1890s 31
1890s
31 births
- 1900s 111
1900s
111 births
- 1910s
1910s
1,277 births
- 1920s
1920s
1,404 births
- 1930s 546
1930s
546 births
- 1940s 325
1940s
325 births
- 1950s 252
1950s
252 births
- 1960s 133
1960s
133 births
- 1970s 99
1970s
99 births
- 1980s 132
1980s
132 births
- 1990s 137
1990s
137 births
- 2000s 200
2000s
200 births
- 2010s 284
2010s
284 births
- 2020s 317
2020s
317 births
What this shows Peak: 1920s at 1,404 births (27% of all-time use).
How Casimir 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 Casimir's total volume
Casimir by state
Where Casimir concentrates geographically, total births since 1894
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Illinois | | 1,078 | 20.5% |
| #2 | New York | | 493 | 9.4% |
| #3 | Pennsylvania | | 429 | 8.2% |
| #4 | Michigan | | 333 | 6.3% |
| #5 | New Jersey | | 193 | 3.7% |
| #6 | Ohio | | 180 | 3.4% |
| #7 | Wisconsin | | 177 | 3.4% |
| #8 | Indiana | | 90 | 1.7% |
1,078 of 5,248 births nationwide. Compared to a flat distribution across 17 reporting states.
Casimir appears in 17 states. Explore state details →
Frequently Asked Questions
How popular is the name Casimir? ▼
Where does Casimir sit in the SSA name archive? ▼
When was Casimir most popular? ▼
Where is Casimir most popular? ▼
How long has the name Casimir been used? ▼
What names are similar to Casimir? ▼
What to do with Casimir's data
- Casimir's decade-level peak was the 1920s (1,404 total births); usage has since declined to 317 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Illinois records the most Casimirs (1,078 births) -- see the full state breakdown if geography matters to your decision. Illinois names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Casimir
Nearby Names Like Casimir
Names with a similar sound, spelling, or feel to Casimir
Compare Casimir side by side: Casimir vs Casey Casimir vs Cash Casimir vs Cason
Related Names
Names with a similar popularity rank to Casimir
Nationwide names with similar peak year or record span
Two nationwide peer axes for Casimir: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1919)
Similar record span (~131 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, 1894–2025 (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 Casimir 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.