How old is someone named Lewis?
The average Lewis is 53 years old.
Half of all living Lewises are between 35 and 73.
When was Lewis popular?
Lewis peaked in 1921 and has been given less and less ever since. Only 736 babies got the name in 2025.
Popular names of 1921 · The most popular names of the 1920s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 4,060 | 0 |
| 1910s | 17,911 | 0 |
| 1920s | 25,491 | 140 |
| 1930s | 20,143 | 2,400 |
| 1940s | 21,040 | 9,000 |
| 1950s | 18,214 | 12,000 |
| 1960s | 11,768 | 9,500 |
| 1970s | 7,600 | 6,800 |
| 1980s | 5,900 | 5,500 |
| 1990s | 4,533 | 4,400 |
| 2000s | 3,430 | 3,400 |
| 2010s | 4,552 | 4,500 |
| 2020s | 3,938 | 3,900 |
How many Lewises are still alive?
About 61,000 Lewises are alive in the US today. That's 39% of the roughly 160,000 babies named Lewis since 1880.
Most Lewises ever born have died: the name was most popular in 1921, long enough ago that many of those babies are gone.
What generation is the name Lewis?
About one in three living Lewises are Baby Boomers, born between 1946 and 1964.
Is Lewis an old name?
Yes. Lewis is older than 81 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Lewis will be 40 in 2056, so its average age will actually fall, as the youngest Lewises make up more of the total.
Is Lewis a boy or girl name?
Almost entirely boys: 99.4% of living Lewises are men.
Names the same age as Lewis
NAME TWIN
Lewis's name twin is Louis. Of all 3,713 names on AgeByName, Louis's age curve is the closest match to Lewis's: 96% alike.
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Questions about the name Lewis
How old is the average Lewis?
The average Lewis in the US is 53 years old. The median is 59, so half are older and half younger.
How many people are named Lewis?
About 61,000 Lewises are alive in the US today, out of roughly 160,000 babies given the name since 1880.
When was the name Lewis most popular?
In 1921, when about 2,700 baby boys were named Lewis.
Is Lewis a Boomer name?
Partly. Baby Boomers are the largest group, about 35% of living Lewises, 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