How Many People Are Named Casimir?
people named Casimir are alive in the United States today (estimate)
About 1 in 209,170 people in the US has this name
Based on 5,248 babies named Casimir in Social Security records from 1894 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎💎 Very Rare
Peak Year
220 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
English form of the Polish name Kazimierz, derived from the Slavic element kaziti "to destroy" combined with miru "peace, world". Four kings of Poland have borne this name, including Casimir III the Great, who greatly strengthened the Polish state in the 14th century. It was also borne Saint Casimir, a 15th-century Polish prince and a patron saint of Poland and Lithuania. The name was imported into Western Europe via Germany, where it was borne by some royalty.
Source of the meaning, origin, pronunciation and related names: Behind the Name.
⚧ Gender Distribution
All of the babies given the name Casimir in the records were boys.
👥 Age Distribution
The average person named Casimir alive today is about 35 years old, and 52% are under 30. Half of them were between 9 and 64 in 2025.
📈 Popularity Over Time
Casimir first appears in the records in 1894 and was given most often in 1919, to 220 babies. In 2025, 73 babies got the name.
Babies given the name each year, 1894 to 2025
🏆 Rank History
Casimir has never been one of the 100 most popular boys' names. Its best rank was #393, in 1917. In 2025 it ranked #2,039.
| Boys | |
|---|---|
| Rank in 2025 | #2,039 |
| Best rank | #393 (1917) |
| Years in the top 100 | None |
| Rank in its biggest decade | #523 in the 1920s |
📍 State-Wise Distribution
People named Casimir alive today, by the state where they were born (estimate; state records start in 1910).
More people named Casimir were born in Illinois than in any other state: about 114 of those alive today. Compared with the national rate in the same years, Casimir was given 6.2 times as often in Illinois, 3 times in Michigan and 2.4 times in Wisconsin.
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