How old is someone named Lillie?
The average Lillie is 54 years old.
Half of all living Lillies are between 20 and 80. The average sits between a large older group and a younger one, so many Lillies are much older than 54.
When was Lillie popular?
Lillie peaked in 1919 and has been given less and less ever since. Only 420 babies got the name in 2025.
Popular names of 1919 · The most popular names of the 1910s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 15,463 | 0 |
| 1910s | 24,771 | 0 |
| 1920s | 29,587 | 490 |
| 1930s | 20,135 | 4,100 |
| 1940s | 15,458 | 8,600 |
| 1950s | 9,655 | 7,400 |
| 1960s | 3,890 | 3,400 |
| 1970s | 1,404 | 1,300 |
| 1980s | 1,004 | 970 |
| 1990s | 1,615 | 1,600 |
| 2000s | 5,248 | 5,200 |
| 2010s | 5,506 | 5,500 |
| 2020s | 2,380 | 2,400 |
How many Lillies are still alive?
About 41,000 Lillies are alive in the US today. That's 26% of the roughly 160,000 babies named Lillie since 1880.
Most Lillies ever born have died: the name was most popular in 1919, long enough ago that many of those babies are gone.
What generation is the name Lillie?
About one in three living Lillies are Baby Boomers, born between 1946 and 1964.
Is Lillie an old name?
Yes. Lillie is older than 82 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Lillie will be 37 in 2056, so its average age will actually fall, as the youngest Lillies make up more of the total.
Is Lillie a boy or girl name?
Almost entirely girls: 99.8% of living Lillies are women.
Names the same age as Lillie
NAME TWIN
Lillie's name twin is Mattie. Of all 3,713 names on AgeByName, Mattie's age curve is the closest match to Lillie's: 91% alike.
Other spellings: Lily (16) · Lilly (19)
Compare: Lillie vs. Lily
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Questions about the name Lillie
How old is the average Lillie?
The average Lillie in the US is 54 years old. The median is 67, so half are older and half younger.
How many people are named Lillie?
About 41,000 Lillies are alive in the US today, out of roughly 160,000 babies given the name since 1880.
When was the name Lillie most popular?
In 1919, when about 3,300 baby girls were named Lillie.
Is Lillie a Boomer name?
Partly. Baby Boomers are the largest group, about 33% of living Lillies, but the name spans several generations.
Estimates from Social Security Administration baby-name records (births 1880–2025) and SSA cohort life tables (2026 Trustees Report). Updated each spring. How we calculate this