How Many People Are Named Lilliam?
An estimated 554 people in the United States have the first name Lilliam. It is almost exclusively a female name. The average bearer is 46 years old, and Lilliam peaked in popularity in 1966 with 23 births that year.
Below you will find a full statistical profile of Lilliam 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 Lilliam paired with any surname.
Estimated Living Americans
554
About 1 in 618,690 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
46
years old
Peak Year
1966
23 births
Total Registered
825
since 1880
Gender Distribution for Lilliam
Lilliam is almost exclusively a female name. Out of 825 total births registered, 100.0% were female.
Lilliam as a female name
Ranked #14,464 in 2024
6 female births in 2024
Peak: 1966 (23 births)
Lilliam: Popularity Over Time
SSA records for Lilliam span from the 1880s to the 2020s, covering 14 decades of naming data. The most popular decade for this name was the 1960s, when 166 babies were registered. Lilliam has declined significantly from its peak in the 1960s. Recent registrations are a fraction of what they were at the name's height.
Lilliam by Decade
How has Lilliam 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.
Lilliam by State
Lilliam + Last Name Combinations
How many people share a full name with Lilliam as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Lilliam
Other first names starting with L with a similar number of bearers.
Lilliam: Questions and Answers
How many people in the U.S. are named Lilliam?
We estimate approximately 554 people named Lilliam 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 618,690 Americans share this first name.
Is Lilliam a common name?
Lilliam is classified as "Very Rare" and is more popular than 85.5% of all first names in the SSA database. A total of 825 births have been registered with this name since 1880.
When was Lilliam most popular?
Lilliam reached peak popularity in 1966, when 23 babies were given this name. The average age of a living person named Lilliam is approximately 46 years old, reflecting when the name was most commonly given.
Is Lilliam a female name?
Lilliam is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Lilliam Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Lilliam Smith, Lilliam Johnson, Lilliam 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.
Search for a full name combination
How Many of Me