How Many People Are Named Isaah?
An estimated 398 people in the United States have the first name Isaah. It is almost exclusively a male name. The average bearer is 23 years old, and Isaah peaked in popularity in 2001 with 34 births that year.
Below you will find a full statistical profile of Isaah 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 Isaah paired with any surname.
Estimated Living Americans
398
About 1 in 861,192 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
23
years old
Peak Year
2001
34 births
Total Registered
409
since 1880
Gender Distribution for Isaah
Isaah is almost exclusively a male name. Out of 409 total births registered, 100.0% were male.
Isaah as a male name
Ranked #10,044 in 2014
7 male births in 2014
Peak: 2001 (34 births)
Isaah: Popularity Over Time
SSA records for Isaah span from the 1920s to the 2010s, covering 4 decades of naming data. The most popular decade for this name was the 2000s, when 247 babies were registered. Isaah has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Isaah by Decade
How has Isaah 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.
Isaah by State
Isaah + Last Name Combinations
How many people share a full name with Isaah as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Isaah
Other first names starting with I with a similar number of bearers.
Isaah: Questions and Answers
How many people in the U.S. are named Isaah?
We estimate approximately 398 people named Isaah 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 861,192 Americans share this first name.
Is Isaah a common name?
Isaah is classified as "Very Rare" and is more popular than 82.3% of all first names in the SSA database. A total of 409 births have been registered with this name since 1880.
When was Isaah most popular?
Isaah reached peak popularity in 2001, when 34 babies were given this name. The average age of a living person named Isaah is approximately 23 years old, reflecting when the name was most commonly given.
Is Isaah a male name?
Isaah is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Isaah Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Isaah Smith, Isaah Johnson, Isaah 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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