How Many People Are Named Illias?
An estimated 125 people in the United States have the first name Illias. It is almost exclusively a male name. The average bearer is 11 years old, and Illias peaked in popularity in 2017 with 18 births that year.
Below you will find a full statistical profile of Illias 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 Illias paired with any surname.
Estimated Living Americans
125
About 1 in 2,742,035 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
11
years old
Peak Year
2017
18 births
Total Registered
126
since 1880
Gender Distribution for Illias
Illias is almost exclusively a male name. Out of 126 total births registered, 100.0% were male.
Illias as a male name
Ranked #11,356 in 2023
6 male births in 2023
Peak: 2017 (18 births)
Illias: Popularity Over Time
SSA records for Illias span from the 2000s to the 2020s, covering 3 decades of naming data. The most popular decade for this name was the 2010s, when 84 babies were registered. Illias has declined significantly from its peak in the 2010s. Recent registrations are a fraction of what they were at the name's height.
Illias by Decade
How has Illias 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.
Illias + Last Name Combinations
How many people share a full name with Illias as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Illias
Other first names starting with I with a similar number of bearers.
Illias: Questions and Answers
How many people in the U.S. are named Illias?
We estimate approximately 125 people named Illias 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 2,742,035 Americans share this first name.
Is Illias a common name?
Illias is classified as "Very Rare" and is more popular than 67.8% of all first names in the SSA database. A total of 126 births have been registered with this name since 1880.
When was Illias most popular?
Illias reached peak popularity in 2017, when 18 babies were given this name. The average age of a living person named Illias is approximately 11 years old, reflecting when the name was most commonly given.
Is Illias a male name?
Illias is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Illias Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Illias Smith, Illias Johnson, Illias 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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