How Many People Are Named Isaiah?
An estimated 241,516 people in the United States have the first name Isaiah. While not in the top 50, it remains a well-known name ranking #212 overall. It is almost exclusively a male name. The average bearer is 19 years old, and Isaiah peaked in popularity in 2006 with 10,483 births that year.
Below you will find a full statistical profile of Isaiah 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 Isaiah paired with any surname.
Key Insights
- While Isaiah is overwhelmingly male, 683 female births have been registered with this name since 1880.
Estimated Living Americans
241,516
About 1 in 1,419 people in the U.S.
Rarity
Common
Predicted Gender
Male
99.7% confidence
Average Age
19
years old
Peak Year
2006
10,483 births
Total Registered
249,316
since 1880
Gender Distribution for Isaiah
Isaiah is almost exclusively a male name. Out of 249,316 total births registered, 99.7% were male.
Isaiah as a male name
Ranked #56 in 2024
5,250 male births in 2024
Peak: 2006 (10,459 births)
Isaiah as a female name
Ranked #8,620 in 2024
12 female births in 2024
Peak: 2004 (58 births)
Isaiah: Popularity Over Time
SSA records for Isaiah span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 2000s, when 93,049 babies were registered. Isaiah has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Isaiah by Decade
How has Isaiah 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.
| Decade | Total | Male | Female | |
|---|---|---|---|---|
| 1880s | 304 | 304 | 0 | |
| 1890s | 264 | 264 | 0 | |
| 1900s | 263 | 263 | 0 | |
| 1910s | 845 | 845 | 0 | |
| 1920s | 1,262 | 1,262 | 0 | |
| 1930s | 1,039 | 1,039 | 0 | |
| 1940s | 1,193 | 1,193 | 0 | |
| 1950s | 1,180 | 1,180 | 0 | |
| 1960s | 727 | 727 | 0 | |
| 1970s | 1,583 | 1,578 | 5 | |
| 1980s | 6,764 | 6,708 | 56 | |
| 1990s | 36,755 | 36,585 | 170 | |
| 2000s | 93,049 | 92,782 | 267 | |
| 2010s | 76,416 | 76,278 | 138 | |
| 2020s | 27,672 | 27,625 | 47 | |
Isaiah by State
Birth registrations for Isaiah span all 51 states and territories in the SSA database. The highest counts are in California, Texas, Florida. The lowest are in Vermont, Wyoming, New Hampshire. On average, about 4,801 Isaiahs were registered per state.
Isaiah + Last Name Combinations
How many people share a full name with Isaiah as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Isaiah
Other first names starting with I with a similar number of bearers.
Isaiah: Questions and Answers
How many people in the U.S. are named Isaiah?
We estimate approximately 241,516 people named Isaiah 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 1,419 Americans share this first name.
Is Isaiah a common name?
Isaiah is classified as "Common" and is more popular than 99.8% of all first names in the SSA database. A total of 249,316 births have been registered with this name since 1880.
When was Isaiah most popular?
Isaiah reached peak popularity in 2006, when 10,483 babies were given this name. The average age of a living person named Isaiah is approximately 19 years old, reflecting when the name was most commonly given.
Is Isaiah a male name?
Isaiah is predominantly male. 99.7% of people with this name are male. See the gender breakdown above for full details.
How many Isaiah Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Isaiah Smith, Isaiah Johnson, Isaiah 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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