How Many People Are Named Ilsa?
An estimated 830 people in the United States have the first name Ilsa. It is almost exclusively a female name. The average bearer is 30 years old, and Ilsa peaked in popularity in 2011 with 34 births that year.
Below you will find a full statistical profile of Ilsa 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 Ilsa paired with any surname.
Estimated Living Americans
830
About 1 in 412,957 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
30
years old
Peak Year
2011
34 births
Total Registered
895
since 1880
Gender Distribution for Ilsa
Ilsa is almost exclusively a female name. Out of 895 total births registered, 100.0% were female.
Ilsa as a female name
Ranked #9,800 in 2024
10 female births in 2024
Peak: 2011 (34 births)
Ilsa: Popularity Over Time
SSA records for Ilsa span from the 1940s to the 2020s, covering 9 decades of naming data. The most popular decade for this name was the 2010s, when 205 babies were registered. While Ilsa is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Ilsa by Decade
How has Ilsa 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.
Ilsa by State
Ilsa + Last Name Combinations
How many people share a full name with Ilsa as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Ilsa
Other first names starting with I with a similar number of bearers.
Ilsa: Questions and Answers
How many people in the U.S. are named Ilsa?
We estimate approximately 830 people named Ilsa 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 412,957 Americans share this first name.
Is Ilsa a common name?
Ilsa is classified as "Very Rare" and is more popular than 88.8% of all first names in the SSA database. A total of 895 births have been registered with this name since 1880.
When was Ilsa most popular?
Ilsa reached peak popularity in 2011, when 34 babies were given this name. The average age of a living person named Ilsa is approximately 30 years old, reflecting when the name was most commonly given.
Is Ilsa a female name?
Ilsa is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Ilsa Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Ilsa Smith, Ilsa Johnson, Ilsa 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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