Quick answers about Casimer
How many people are named Casimer?
An estimated 147 living Americans are named Casimer.
How rare is Casimer?
Casimer fell below the SSA's 5-birth reporting floor in 2025. It is extremely rare as a new baby name.
How old is the typical Casimer?
The median age of a living American named Casimer is approximately 73 years, with most bearers falling between 61 and 79 years old.
Is Casimer still popular?
Not especially. Casimer has been declining since its 1918 peak and registered 0 births in 2025.
Where is Casimer most common?
Casimer has its strongest geographic signal in Michigan, where it appears 5.2× more often than the national baseline.
1895Peak 19182025
Where it lives now
Casimer is most concentrated in Michigan — about 5.2× the national rate in the 1920s. It also runs high in Illinois.
States where Casimer is given more often than the national average — its present-day heartland.
3×+
2×+
1.5×+
1.2×+
~ national
