How Many People Are Named Lillias?
An estimated 6 people in the United States have the first name Lillias. It is almost exclusively a female name. The average bearer is 98 years old, and Lillias peaked in popularity in 1918 with 12 births that year.
Below you will find a full statistical profile of Lillias 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 Lillias paired with any surname.
Key Insights
- With an average bearer age of 98, Lillias is a vintage name most associated with earlier generations. Most living bearers were born before 1938.
- Lillias is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
6
About 1 in 57,125,723 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
98
years old
Peak Year
1918
12 births
Total Registered
194
since 1880
Gender Distribution for Lillias
Lillias is almost exclusively a female name. Out of 194 total births registered, 100.0% were female.
Lillias as a female name
Ranked #4,693 in 1938
5 female births in 1938
Peak: 1918 (12 births)
Lillias: Popularity Over Time
SSA records for Lillias span from the 1890s to the 1930s, covering 5 decades of naming data. The most popular decade for this name was the 1920s, when 72 babies were registered. While Lillias is less common than at its peak in the 1920s, it remains a well-established name with steady registrations.
Lillias by Decade
How has Lillias 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.
Lillias + Last Name Combinations
How many people share a full name with Lillias as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Lillias
Other first names starting with L with a similar number of bearers.
Lillias: Questions and Answers
How many people in the U.S. are named Lillias?
We estimate approximately 6 people named Lillias 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 57,125,723 Americans share this first name.
Is Lillias a common name?
Lillias is classified as "Very Rare" and is more popular than 22.3% of all first names in the SSA database. A total of 194 births have been registered with this name since 1880.
When was Lillias most popular?
Lillias reached peak popularity in 1918, when 12 babies were given this name. The average age of a living person named Lillias is approximately 98 years old, reflecting when the name was most commonly given.
Is Lillias a female name?
Lillias is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Lillias Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Lillias Smith, Lillias Johnson, Lillias 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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