How Many People Are Named Lill?
An estimated 7 people in the United States have the first name Lill. It is almost exclusively a female name. The average bearer is 72 years old, and Lill peaked in popularity in 1946 with 6 births that year.
Below you will find a full statistical profile of Lill 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 Lill paired with any surname.
Key Insights
- With an average bearer age of 72, Lill is a vintage name most associated with earlier generations. Most living bearers were born before 1964.
- Lill is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
7
About 1 in 48,964,905 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
72
years old
Peak Year
1946
6 births
Total Registered
11
since 1880
Gender Distribution for Lill
Lill is almost exclusively a female name. Out of 11 total births registered, 100.0% were female.
Lill as a female name
Ranked #6,901 in 1960
5 female births in 1960
Peak: 1946 (6 births)
Lill: Popularity Over Time
SSA records for Lill span from the 1940s to the 1960s, covering 2 decades of naming data. The most popular decade for this name was the 1940s, when 6 babies were registered. Lill remains highly popular today, with recent registration numbers near its historical peak.
Lill by Decade
How has Lill 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.
Lill + Last Name Combinations
How many people share a full name with Lill as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Lill
Other first names starting with L with a similar number of bearers.
Lill: Questions and Answers
How many people in the U.S. are named Lill?
We estimate approximately 7 people named Lill 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 48,964,905 Americans share this first name.
Is Lill a common name?
Lill is classified as "Very Rare" and is more popular than 23.8% of all first names in the SSA database. A total of 11 births have been registered with this name since 1880.
When was Lill most popular?
Lill reached peak popularity in 1946, when 6 babies were given this name. The average age of a living person named Lill is approximately 72 years old, reflecting when the name was most commonly given.
Is Lill a female name?
Lill is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Lill Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Lill Smith, Lill Johnson, Lill 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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