How Many People Are Named Irja?
An estimated 2 people in the United States have the first name Irja. It is almost exclusively a female name. The average bearer is 101 years old, and Irja peaked in popularity in 1918 with 20 births that year.
Below you will find a full statistical profile of Irja 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 Irja paired with any surname.
Key Insights
- With an average bearer age of 101, Irja is a vintage name most associated with earlier generations. Most living bearers were born before 1935.
- Irja is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
2
About 1 in 171,377,169 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
101
years old
Peak Year
1918
20 births
Total Registered
156
since 1880
Gender Distribution for Irja
Irja is almost exclusively a female name. Out of 156 total births registered, 100.0% were female.
Irja as a female name
Ranked #4,859 in 1930
5 female births in 1930
Peak: 1918 (20 births)
Irja: Popularity Over Time
SSA records for Irja span from the 1910s to the 1930s, covering 3 decades of naming data. The most popular decade for this name was the 1910s, when 119 babies were registered. Irja has declined significantly from its peak in the 1910s. Recent registrations are a fraction of what they were at the name's height.
Irja by Decade
How has Irja 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.
Irja + Last Name Combinations
How many people share a full name with Irja as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Irja
Other first names starting with I with a similar number of bearers.
Irja: Questions and Answers
How many people in the U.S. are named Irja?
We estimate approximately 2 people named Irja 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 171,377,169 Americans share this first name.
Is Irja a common name?
Irja is classified as "Very Rare" and is more popular than 4.3% of all first names in the SSA database. A total of 156 births have been registered with this name since 1880.
When was Irja most popular?
Irja reached peak popularity in 1918, when 20 babies were given this name. The average age of a living person named Irja is approximately 101 years old, reflecting when the name was most commonly given.
Is Irja a female name?
Irja is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Irja Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Irja Smith, Irja Johnson, Irja 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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