How Many People Are Named Lilly?
An estimated 53,208 people in the United States have the first name Lilly. It is almost exclusively a female name. The average bearer is 19 years old, and Lilly peaked in popularity in 2010 with 2,890 births that year.
Below you will find a full statistical profile of Lilly 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 Lilly paired with any surname.
Estimated Living Americans
53,208
About 1 in 6,442 people in the U.S.
Rarity
Uncommon
Predicted Gender
Female
100.0% confidence
Average Age
19
years old
Peak Year
2010
2,890 births
Total Registered
65,499
since 1880
Gender Distribution for Lilly
Lilly is almost exclusively a female name. Out of 65,499 total births registered, 100.0% were female.
Lilly as a male name
Ranked #13,785 in 2008
5 male births in 2008
Peak: 2004 (9 births)
Lilly as a female name
Ranked #259 in 2024
1,217 female births in 2024
Peak: 2010 (2,890 births)
Lilly: Popularity Over Time
SSA records for Lilly span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 2010s, when 23,508 babies were registered. Lilly has declined significantly from its peak in the 2010s. Recent registrations are a fraction of what they were at the name's height.
Lilly by Decade
How has Lilly 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.
| Decade | Total | Male | Female | |
|---|---|---|---|---|
| 1880s | 781 | 0 | 781 | |
| 1890s | 1,107 | 0 | 1,107 | |
| 1900s | 1,314 | 0 | 1,314 | |
| 1910s | 2,369 | 0 | 2,369 | |
| 1920s | 2,964 | 0 | 2,964 | |
| 1930s | 2,034 | 0 | 2,034 | |
| 1940s | 1,596 | 0 | 1,596 | |
| 1950s | 1,416 | 0 | 1,416 | |
| 1960s | 1,133 | 0 | 1,133 | |
| 1970s | 632 | 0 | 632 | |
| 1980s | 713 | 0 | 713 | |
| 1990s | 2,270 | 0 | 2,270 | |
| 2000s | 17,294 | 24 | 17,270 | |
| 2010s | 23,508 | 0 | 23,508 | |
| 2020s | 6,368 | 0 | 6,368 | |
Lilly by State
Birth registrations for Lilly span all 51 states and territories in the SSA database. The highest counts are in California, Texas, Florida. The lowest are in District of Columbia, Vermont, Delaware. On average, about 1,131 Lillys were registered per state.
Lilly + Last Name Combinations
How many people share a full name with Lilly as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Lilly
Other first names starting with L with a similar number of bearers.
Lilly: Questions and Answers
How many people in the U.S. are named Lilly?
We estimate approximately 53,208 people named Lilly 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 6,442 Americans share this first name.
Is Lilly a common name?
Lilly is classified as "Uncommon" and is more popular than 99.2% of all first names in the SSA database. A total of 65,499 births have been registered with this name since 1880.
When was Lilly most popular?
Lilly reached peak popularity in 2010, when 2,890 babies were given this name. The average age of a living person named Lilly is approximately 19 years old, reflecting when the name was most commonly given.
Is Lilly a female name?
Lilly is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Lilly Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Lilly Smith, Lilly Johnson, Lilly 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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