How Many People Are Named Isiah?
An estimated 19,637 people in the United States have the first name Isiah. It is almost exclusively a male name. The average bearer is 31 years old, and Isiah peaked in popularity in 2001 with 822 births that year.
Below you will find a full statistical profile of Isiah 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 Isiah paired with any surname.
Estimated Living Americans
19,637
About 1 in 17,455 people in the U.S.
Rarity
Uncommon
Predicted Gender
Male
100.0% confidence
Average Age
31
years old
Peak Year
2001
822 births
Total Registered
24,598
since 1880
Gender Distribution for Isiah
Isiah is almost exclusively a male name. Out of 24,598 total births registered, 100.0% were male.
Isiah as a male name
Ranked #1,310 in 2024
148 male births in 2024
Peak: 2001 (822 births)
Isiah as a female name
Ranked #16,710 in 2003
5 female births in 2003
Peak: 1996 (6 births)
Isiah: Popularity Over Time
SSA records for Isiah span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 2000s, when 7,047 babies were registered. Isiah has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Isiah by Decade
How has Isiah 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.
Isiah by State
Birth registrations for Isiah span all 48 states and territories in the SSA database. The highest counts are in New York, Texas, California. The lowest are in Rhode Island, New Hampshire, Hawaii. On average, about 421 Isiahs were registered per state.
Isiah + Last Name Combinations
How many people share a full name with Isiah as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Isiah
Other first names starting with I with a similar number of bearers.
Isiah: Questions and Answers
How many people in the U.S. are named Isiah?
We estimate approximately 19,637 people named Isiah 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 17,455 Americans share this first name.
Is Isiah a common name?
Isiah is classified as "Uncommon" and is more popular than 98.5% of all first names in the SSA database. A total of 24,598 births have been registered with this name since 1880.
When was Isiah most popular?
Isiah reached peak popularity in 2001, when 822 babies were given this name. The average age of a living person named Isiah is approximately 31 years old, reflecting when the name was most commonly given.
Is Isiah a male name?
Isiah is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Isiah Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Isiah Smith, Isiah Johnson, Isiah 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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