How Many People Are Named Isidoro?
An estimated 893 people in the United States have the first name Isidoro. It is almost exclusively a male name. The average bearer is 47 years old, and Isidoro peaked in popularity in 1929 with 24 births that year.
Below you will find a full statistical profile of Isidoro 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 Isidoro paired with any surname.
Estimated Living Americans
893
About 1 in 383,823 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
47
years old
Peak Year
1929
24 births
Total Registered
1,292
since 1880
Gender Distribution for Isidoro
Isidoro is almost exclusively a male name. Out of 1,292 total births registered, 100.0% were male.
Isidoro as a male name
Ranked #8,500 in 2023
9 male births in 2023
Peak: 1929 (24 births)
Isidoro: Popularity Over Time
SSA records for Isidoro span from the 1910s to the 2020s, covering 12 decades of naming data. The most popular decade for this name was the 1990s, when 157 babies were registered. Isidoro has declined significantly from its peak in the 1990s. Recent registrations are a fraction of what they were at the name's height.
Isidoro by Decade
How has Isidoro 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.
Isidoro by State
Birth registrations for Isidoro span all 5 states and territories in the SSA database. The highest counts are in Texas, California, New Mexico. The lowest are in New York, Illinois, New Mexico. On average, about 117 Isidoros were registered per state.
Isidoro + Last Name Combinations
How many people share a full name with Isidoro as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Isidoro
Other first names starting with I with a similar number of bearers.
Isidoro: Questions and Answers
How many people in the U.S. are named Isidoro?
We estimate approximately 893 people named Isidoro 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 383,823 Americans share this first name.
Is Isidoro a common name?
Isidoro is classified as "Very Rare" and is more popular than 89.4% of all first names in the SSA database. A total of 1,292 births have been registered with this name since 1880.
When was Isidoro most popular?
Isidoro reached peak popularity in 1929, when 24 babies were given this name. The average age of a living person named Isidoro is approximately 47 years old, reflecting when the name was most commonly given.
Is Isidoro a male name?
Isidoro is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Isidoro Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Isidoro Smith, Isidoro Johnson, Isidoro 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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