How Many People Are Named Lilli?
An estimated 3,130 people in the United States have the first name Lilli. It is almost exclusively a female name. The average bearer is 24 years old, and Lilli peaked in popularity in 2006 with 174 births that year.
Below you will find a full statistical profile of Lilli 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 Lilli paired with any surname.
Estimated Living Americans
3,130
About 1 in 109,506 people in the U.S.
Rarity
Rare
Predicted Gender
Female
100.0% confidence
Average Age
24
years old
Peak Year
2006
174 births
Total Registered
3,344
since 1880
Gender Distribution for Lilli
Lilli is almost exclusively a female name. Out of 3,344 total births registered, 100.0% were female.
Lilli as a female name
Ranked #3,998 in 2024
37 female births in 2024
Peak: 2006 (174 births)
Lilli: Popularity Over Time
SSA records for Lilli span from the 1910s to the 2020s, covering 12 decades of naming data. The most popular decade for this name was the 2000s, when 1,302 babies were registered. Lilli has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Lilli by Decade
How has Lilli 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.
Lilli by State
Birth registrations for Lilli span all 28 states and territories in the SSA database. The highest counts are in California, Texas, Florida. The lowest are in West Virginia, Oregon, Arizona. On average, about 39 Lillis were registered per state.
Lilli + Last Name Combinations
How many people share a full name with Lilli as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Lilli
Other first names starting with L with a similar number of bearers.
Lilli: Questions and Answers
How many people in the U.S. are named Lilli?
We estimate approximately 3,130 people named Lilli 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 109,506 Americans share this first name.
Is Lilli a common name?
Lilli is classified as "Rare" and is more popular than 95.3% of all first names in the SSA database. A total of 3,344 births have been registered with this name since 1880.
When was Lilli most popular?
Lilli reached peak popularity in 2006, when 174 babies were given this name. The average age of a living person named Lilli is approximately 24 years old, reflecting when the name was most commonly given.
Is Lilli a female name?
Lilli is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Lilli Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Lilli Smith, Lilli Johnson, Lilli 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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