How Many People Are Named Ileen?
An estimated 1,057 people in the United States have the first name Ileen. It is almost exclusively a female name. The average bearer is 46 years old, and Ileen peaked in popularity in 1924 with 51 births that year.
Below you will find a full statistical profile of Ileen 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 Ileen paired with any surname.
Estimated Living Americans
1,057
About 1 in 324,271 people in the U.S.
Rarity
Rare
Predicted Gender
Female
100.0% confidence
Average Age
46
years old
Peak Year
1924
51 births
Total Registered
2,152
since 1880
Gender Distribution for Ileen
Ileen is almost exclusively a female name. Out of 2,152 total births registered, 100.0% were female.
Ileen as a female name
Ranked #14,089 in 2024
6 female births in 2024
Peak: 1924 (51 births)
Ileen: Popularity Over Time
SSA records for Ileen span from the 1890s to the 2020s, covering 14 decades of naming data. The most popular decade for this name was the 1920s, when 422 babies were registered. Ileen has declined significantly from its peak in the 1920s. Recent registrations are a fraction of what they were at the name's height.
Ileen by Decade
How has Ileen 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.
Ileen by State
Birth registrations for Ileen span all 10 states and territories in the SSA database. The highest counts are in California, New York, Texas. The lowest are in Illinois, Minnesota, Iowa. On average, about 46 Ileens were registered per state.
Ileen + Last Name Combinations
How many people share a full name with Ileen as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Ileen
Other first names starting with I with a similar number of bearers.
Ileen: Questions and Answers
How many people in the U.S. are named Ileen?
We estimate approximately 1,057 people named Ileen 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 324,271 Americans share this first name.
Is Ileen a common name?
Ileen is classified as "Rare" and is more popular than 90.5% of all first names in the SSA database. A total of 2,152 births have been registered with this name since 1880.
When was Ileen most popular?
Ileen reached peak popularity in 1924, when 51 babies were given this name. The average age of a living person named Ileen is approximately 46 years old, reflecting when the name was most commonly given.
Is Ileen a female name?
Ileen is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Ileen Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Ileen Smith, Ileen Johnson, Ileen 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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