How old is someone named Kathleen?
The average Kathleen is 64 years old.
Half of all living Kathleens are between 57 and 75.
When was Kathleen popular?
Parents have been choosing Kathleen less often since its peak in 1951; 201 babies got the name in 2025.
Popular names of 1951 · The most popular names of the 1950s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 3,924 | 0 |
| 1910s | 16,606 | 0 |
| 1920s | 33,679 | 580 |
| 1930s | 34,708 | 8,000 |
| 1940s | 153,343 | 92,000 |
| 1950s | 224,736 | 170,000 |
| 1960s | 121,252 | 110,000 |
| 1970s | 45,025 | 42,000 |
| 1980s | 39,578 | 38,000 |
| 1990s | 24,865 | 24,000 |
| 2000s | 10,065 | 10,000 |
| 2010s | 3,809 | 3,800 |
| 2020s | 1,415 | 1,400 |
How many Kathleens are still alive?
About 500,000 Kathleens are alive in the US today. That's 70% of the roughly 720,000 babies named Kathleen since 1880.
Roughly half of all Kathleens ever born are still living.
What generation is the name Kathleen?
More than half of living Kathleens are Baby Boomers, born between 1946 and 1964.
Is Kathleen an old name?
Yes. Kathleen is older than 94 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Kathleen will be 73 in 2056, so the name is aging slowly.
Is Kathleen a boy or girl name?
Almost entirely girls: 99.8% of living Kathleens are women.
Names the same age as Kathleen
NAME TWIN
Kathleen's name twin is Dennis. Of all 3,713 names on AgeByName, Dennis's age curve is the closest match to Kathleen's: 94% alike.
Other spellings: Cathleen (61)
Compare: Cathleen vs. Kathleen
Think you can guess a Brittany's age?
Ten names, one slider each. Share your score.
Questions about the name Kathleen
How old is the average Kathleen?
The average Kathleen in the US is 64 years old. The median is 68, so half are older and half younger.
How many people are named Kathleen?
About 500,000 Kathleens are alive in the US today, out of roughly 720,000 babies given the name since 1880.
When was the name Kathleen most popular?
In 1951, when about 27,000 baby girls were named Kathleen.
Is Kathleen a Boomer name?
Yes. About 59% of living Kathleens 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