How Many People Are Named Isaias?
An estimated 17,247 people in the United States have the first name Isaias. It is almost exclusively a male name. The average bearer is 20 years old, and Isaias peaked in popularity in 2023 with 705 births that year.
Below you will find a full statistical profile of Isaias 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 Isaias paired with any surname.
Estimated Living Americans
17,247
About 1 in 19,873 people in the U.S.
Rarity
Uncommon
Predicted Gender
Male
100.0% confidence
Average Age
20
years old
Peak Year
2023
705 births
Total Registered
17,887
since 1880
Gender Distribution for Isaias
Isaias is almost exclusively a male name. Out of 17,887 total births registered, 100.0% were male.
Isaias as a male name
Ranked #446 in 2024
703 male births in 2024
Peak: 2023 (705 births)
Isaias: Popularity Over Time
SSA records for Isaias span from the 1910s to the 2020s, covering 12 decades of naming data. The most popular decade for this name was the 2010s, when 5,212 babies were registered. While Isaias is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Isaias by Decade
How has Isaias 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.
Isaias by State
Birth registrations for Isaias span all 37 states and territories in the SSA database. The highest counts are in California, Texas, Florida. The lowest are in Idaho, Kentucky, Louisiana. On average, about 425 Isaiass were registered per state.
Isaias + Last Name Combinations
How many people share a full name with Isaias as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Isaias
Other first names starting with I with a similar number of bearers.
Isaias: Questions and Answers
How many people in the U.S. are named Isaias?
We estimate approximately 17,247 people named Isaias 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 19,873 Americans share this first name.
Is Isaias a common name?
Isaias is classified as "Uncommon" and is more popular than 98.3% of all first names in the SSA database. A total of 17,887 births have been registered with this name since 1880.
When was Isaias most popular?
Isaias reached peak popularity in 2023, when 705 babies were given this name. The average age of a living person named Isaias is approximately 20 years old, reflecting when the name was most commonly given.
Is Isaias a male name?
Isaias is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Isaias Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Isaias Smith, Isaias Johnson, Isaias 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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