How Many People Are Named Lilley?
An estimated 421 people in the United States have the first name Lilley. It is almost exclusively a female name. The average bearer is 15 years old, and Lilley peaked in popularity in 2008 with 33 births that year.
Below you will find a full statistical profile of Lilley 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 Lilley paired with any surname.
Estimated Living Americans
421
About 1 in 814,143 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
15
years old
Peak Year
2008
33 births
Total Registered
430
since 1880
Gender Distribution for Lilley
Lilley is almost exclusively a female name. Out of 430 total births registered, 100.0% were female.
Lilley as a female name
Ranked #16,585 in 2023
5 female births in 2023
Peak: 2008 (33 births)
Lilley: Popularity Over Time
SSA records for Lilley span from the 1910s to the 2020s, covering 5 decades of naming data. The most popular decade for this name was the 2010s, when 195 babies were registered. Lilley has declined significantly from its peak in the 2010s. Recent registrations are a fraction of what they were at the name's height.
Lilley by Decade
How has Lilley 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.
Lilley by State
Lilley + Last Name Combinations
How many people share a full name with Lilley as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Lilley
Other first names starting with L with a similar number of bearers.
Lilley: Questions and Answers
How many people in the U.S. are named Lilley?
We estimate approximately 421 people named Lilley 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 814,143 Americans share this first name.
Is Lilley a common name?
Lilley is classified as "Very Rare" and is more popular than 82.9% of all first names in the SSA database. A total of 430 births have been registered with this name since 1880.
When was Lilley most popular?
Lilley reached peak popularity in 2008, when 33 babies were given this name. The average age of a living person named Lilley is approximately 15 years old, reflecting when the name was most commonly given.
Is Lilley a female name?
Lilley is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Lilley Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Lilley Smith, Lilley Johnson, Lilley 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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