How old is someone named Rex?
The average Rex is 51 years old.
Half of all living Rexes are between 31 and 71. The average sits between a large older group and a younger one, so many Rexes are much older than 51.
When was Rex popular?
Rex has never really gone out of style. Parents have chosen it every year for more than a century; its busiest year was 1952.
Popular names of 1952 · The most popular names of the 1950s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 497 | 0 |
| 1910s | 3,253 | 0 |
| 1920s | 5,660 | under 100 |
| 1930s | 5,961 | 750 |
| 1940s | 6,682 | 3,000 |
| 1950s | 13,543 | 8,900 |
| 1960s | 8,758 | 7,000 |
| 1970s | 3,366 | 3,000 |
| 1980s | 2,543 | 2,400 |
| 1990s | 1,740 | 1,700 |
| 2000s | 2,048 | 2,000 |
| 2010s | 3,945 | 3,900 |
| 2020s | 2,106 | 2,100 |
How many Rexes are still alive?
About 35,000 Rexes are alive in the US today. That's 57% of the roughly 61,000 babies named Rex since 1880.
Roughly half of all Rexes ever born are still living.
What generation is the name Rex?
About two in five living Rexes are Baby Boomers, born between 1946 and 1964.
Is Rex an old name?
Yes. Rex is older than 79 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Rex will be 41 in 2056, so its average age will actually fall, as the youngest Rexes make up more of the total.
Is Rex a boy or girl name?
Almost entirely boys: 99.8% of living Rexes are men.
Names the same age as Rex
NAME TWIN
Rex's name twin is Gwendolyn. Of all 3,713 names on AgeByName, Gwendolyn's age curve is the closest match to Rex's: 90% alike.
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Questions about the name Rex
How old is the average Rex?
The average Rex in the US is 51 years old. The median is 61, so half are older and half younger.
How many people are named Rex?
About 35,000 Rexes are alive in the US today, out of roughly 61,000 babies given the name since 1880.
When was the name Rex most popular?
In 1952, when about 1,500 baby boys were named Rex.
Is Rex a Boomer name?
Partly. Baby Boomers are the largest group, about 43% of living Rexes, 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