How old is someone named Lou?
The average Lou is 65 years old.
Half of all living Lous are between 63 and 75.
When was Lou popular?
Lou was at its most popular in the mid 1950s. Parents have been moving away from it for decades, and 146 babies were named Lou in 2025.
Popular names of 1954 · The most popular names of the 1950s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 1,345 | 0 |
| 1910s | 2,821 | 0 |
| 1920s | 4,282 | under 100 |
| 1930s | 5,498 | 1,200 |
| 1940s | 5,149 | 2,800 |
| 1950s | 9,597 | 7,500 |
| 1960s | 3,450 | 3,000 |
| 1970s | 1,026 | 950 |
| 1980s | 344 | 330 |
| 1990s | 226 | 220 |
| 2000s | 244 | 240 |
| 2010s | 563 | 560 |
| 2020s | 784 | 780 |
How many Lous are still alive?
About 18,000 Lous are alive in the US today. That's 46% of the roughly 38,000 babies named Lou since 1880.
Roughly half of all Lous ever born are still living.
What generation is the name Lou?
More than half of living Lous are Baby Boomers, born between 1946 and 1964.
Is Lou an old name?
Yes. Lou is older than 95 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Lou will be 40 in 2056, so its average age will actually fall, as the youngest Lous make up more of the total.
Is Lou a boy or girl name?
Mostly a girl's name: 87% of living Lous are women, and 13% are men.
The women average 69 and the men 41.
Names the same age as Lou
NAME TWIN
Lou's name twin is Jo. Of all 3,713 names on AgeByName, Jo's age curve is the closest match to Lou's: 84% alike.
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Questions about the name Lou
How old is the average Lou?
The average Lou in the US is 65 years old. The median is 70, so half are older and half younger.
How many people are named Lou?
About 18,000 Lous are alive in the US today, out of roughly 38,000 babies given the name since 1880.
When was the name Lou most popular?
In 1954, when about 1,500 baby girls were named Lou.
Is Lou a Boomer name?
Yes. About 61% of living Lous are Baby Boomers, born between 1946 and 1964.
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