Total births
1,084
Boys' name · since 1881
Casimiro
Since 1881, U.S. Social Security records show 1,084 babies named Casimiro, peaking in 1921. See the year-by-year trend, decade totals, and state rankings below, sourced from federal birth data.
- 1,084
- total births
- 1881–2025
- years on record
- 1920s
- peak decade
- 16%
- born in that decade
Casimiro is not among the current top-ranked boys names; 1,084 have been recorded since 1881.
According to the U.S. Social Security Administration, Casimiro has been recorded 1,084 times among boys since 1881, though it is not among the currently most-used boys names, with its heaviest use in the 1920s. This profile covers year-by-year birth trends, decade totals, and state-level distribution, all derived directly from SSA birth-registration files spanning 1881 to 2025.
- 1,084 total births
- 1881–2025 years on record
- 1920s peak decade
- 16% born in that decade
Data updated Jun 2026
The verdict
1,084 boys have been named Casimiro since 1881, peaking in the 1920s, last recorded in 2025.
- 1,084
- total births
- 1881–2025
- years on record
- 1920s
- peak decade
- 16%
- born in that decade
1920s
Peak decade
16% of everyone ever named Casimiro was born in this single decade.
1921
Single peak year
28 babies were named Casimiro in 1921 - its busiest year on record.
Casimiro's usage pattern, beyond the headline number
Divide Casimiro's SSA record in two at 1964 and the more recent half accounts for 44% of all births, the earlier half the remaining 56%, a genuinely balanced usage pattern. Its calmest year was 1938, with only 5 births recorded -- set against the 1921 peak of 28, that's the full swing in one name's fortunes.
Casimiro at a glance
Last recorded 2025Peak year
1921
Current rank
Unranked
Active since
1881
Casimiro popularity over time
Annual U.S. births registered with the Social Security Administration · 1881–2025
- Peak year (1921)
- 28
- Annual births at peak, across 145 years of records
Casimiro by decade
Total births in each ten-year window, peak vs trough at a glance
1920s was Casimiro's strongest decade.
170 babies received the name during that ten-year window, about 16% of all-time use.
Casimiro births by decade
Total births in each ten-year window
- 1880s 6
1880s
6 births
- 1910s
1910s
78 births
- 1920s
1920s
170 births
- 1930s
1930s
113 births
- 1940s
1940s
96 births
- 1950s
1950s
115 births
- 1960s
1960s
98 births
- 1970s
1970s
104 births
- 1980s
1980s
103 births
- 1990s
1990s
73 births
- 2000s
2000s
74 births
- 2010s 27
2010s
27 births
- 2020s 27
2020s
27 births
What this shows Peak: 1920s at 170 births (16% of all-time use).
How Casimiro 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 Casimiro's total volume
Casimiro vs 15 similarly-sized boys names
Casimiro by state
Where Casimiro concentrates geographically, total births since 1881
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Texas | | 436 | 40.2% |
| #2 | California | | 31 | 2.9% |
| #3 | New Mexico | | 5 | 0.5% |
Texas share of Casimiro's total US births 40.2%
Even split
436 of 1,084 births nationwide. Compared to a flat distribution across 3 reporting states.
Frequently Asked Questions
How popular is the name Casimiro? ▼
1,084 babies have been named Casimiro since 1881. It was last recorded in 2025. The peak year was 1921 with 28 births.
When was Casimiro most popular? ▼
Casimiro was most popular in the 1920s decade with 170 total births. The single peak year was 1921.
Where is Casimiro most popular? ▼
The top states for the name Casimiro are Texas (436 births), California (31 births), New Mexico (5 births).
How long has the name Casimiro been used? ▼
The SSA has tracked Casimiro since 1881 -- 145 years through the most recent 2025 data.
What names are similar to Casimiro? ▼
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 Casimiro's data
- Casimiro's decade-level peak was the 1920s (170 total births); usage has since declined to 27 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Texas records the most Casimiros (436 births) -- see the full state breakdown if geography matters to your decision. Texas 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 Casimiro
Nearby Names Like Casimiro
Names with a similar sound, spelling, or feel to Casimiro
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 Casimiro side by side: Casimiro vs Casey Casimiro vs Cash Casimiro vs Cason
Related Names
Names with a similar number of total births
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. "Casimiro: Baby Name Since 1881 - 1,084 Births, Peak 1921." NameAlmanac. Accessed via https://namealmanac.com/name/casimiro. 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 Casimiro 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.