How Many People Are Named Isidor?
An estimated 73 people in the United States have the first name Isidor. It is almost exclusively a male name. The average bearer is 52 years old, and Isidor peaked in popularity in 1914 with 24 births that year.
Below you will find a full statistical profile of Isidor 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 Isidor paired with any surname.
Key Insights
- Isidor is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
73
About 1 in 4,695,265 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
52
years old
Peak Year
1914
24 births
Total Registered
411
since 1880
Gender Distribution for Isidor
Isidor is almost exclusively a male name. Out of 411 total births registered, 100.0% were male.
Isidor as a male name
Ranked #9,316 in 2024
8 male births in 2024
Peak: 1914 (24 births)
Isidor: Popularity Over Time
SSA records for Isidor span from the 1880s to the 2020s, covering 11 decades of naming data. The most popular decade for this name was the 1910s, when 160 babies were registered. Isidor has declined significantly from its peak in the 1910s. Recent registrations are a fraction of what they were at the name's height.
Isidor by Decade
How has Isidor 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.
Isidor by State
Isidor + Last Name Combinations
How many people share a full name with Isidor as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Isidor
Other first names starting with I with a similar number of bearers.
Isidor: Questions and Answers
How many people in the U.S. are named Isidor?
We estimate approximately 73 people named Isidor 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 4,695,265 Americans share this first name.
Is Isidor a common name?
Isidor is classified as "Very Rare" and is more popular than 60% of all first names in the SSA database. A total of 411 births have been registered with this name since 1880.
When was Isidor most popular?
Isidor reached peak popularity in 1914, when 24 babies were given this name. The average age of a living person named Isidor is approximately 52 years old, reflecting when the name was most commonly given.
Is Isidor a male name?
Isidor is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Isidor Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Isidor Smith, Isidor Johnson, Isidor 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 0 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau estimate. Full methodology.
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