How Many People Are Named Casimer?
An estimated 235 people in the United States have the first name Casimer. It is almost exclusively a male name. The average bearer is 76 years old, and Casimer peaked in popularity in 1918 with 135 births that year.
Below you will find a full statistical profile of Casimer as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Casimer paired with any surname.
Key Insights
- With an average bearer age of 76, Casimer is a vintage name most associated with earlier generations. Most living bearers were born before 1960.
Estimated Living Americans
235
About 1 in 1,458,529 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
76
years old
Peak Year
1918
135 births
Total Registered
1,895
since 1880
Gender Distribution for Casimer
Casimer is almost exclusively a male name. Out of 1,895 total births registered, 100.0% were male.
Casimer as a male name
Ranked #12,604 in 2017
5 male births in 2017
Peak: 1918 (135 births)
Casimer: Popularity Over Time
SSA records for Casimer span from the 1890s to the 2010s, covering 13 decades of naming data. The most popular decade for this name was the 1910s, when 767 babies were registered. Casimer has declined significantly from its peak in the 1910s. Recent registrations are a fraction of what they were at the name's height.
Casimer by Decade
How has Casimer tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Casimer by State
Birth registrations for Casimer span all 10 states and territories in the SSA database. The highest counts are in Illinois, New York, Michigan. The lowest are in Wisconsin, Massachusetts, Connecticut. On average, about 120 Casimers were registered per state.
Casimer + Last Name Combinations
How many people share a full name with Casimer as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Casimer
Other first names starting with C with a similar number of bearers.
Casimer: Questions and Answers
How many people in the U.S. are named Casimer?
We estimate approximately 235 people named Casimer are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 1,458,529 Americans share this first name.
Is Casimer a common name?
Casimer is classified as "Very Rare" and is more popular than 76.3% of all first names in the SSA database. A total of 1,895 births have been registered with this name since 1880.
When was Casimer most popular?
Casimer reached peak popularity in 1918, when 135 babies were given this name. The average age of a living person named Casimer is approximately 76 years old, reflecting when the name was most commonly given.
Is Casimer a male name?
Casimer is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Casimer Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Casimer Smith, Casimer Johnson, Casimer Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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