How old is someone named Rosemary?
The average Rosemary is 58 years old.
Half of all living Rosemarys are between 42 and 78. The average sits between a large older group and a younger one, so many Rosemarys are much older than 58.
When was Rosemary popular?
Few names are as steady as Rosemary. It peaked in 1947, but babies have been named Rosemary every year since records began, and 1,222 were in 2025.
Popular names of 1947 · The most popular names of the 1940s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 634 | 0 |
| 1910s | 7,079 | 0 |
| 1920s | 26,020 | 540 |
| 1930s | 24,941 | 5,300 |
| 1940s | 34,382 | 20,000 |
| 1950s | 25,068 | 19,000 |
| 1960s | 14,652 | 13,000 |
| 1970s | 5,835 | 5,500 |
| 1980s | 5,010 | 4,800 |
| 1990s | 4,056 | 4,000 |
| 2000s | 3,961 | 3,900 |
| 2010s | 5,930 | 5,900 |
| 2020s | 5,682 | 5,700 |
How many Rosemarys are still alive?
About 87,000 Rosemarys are alive in the US today. That's 53% of the roughly 160,000 babies named Rosemary since 1882.
Roughly half of all Rosemarys ever born are still living.
What generation is the name Rosemary?
About two in five living Rosemarys are Baby Boomers, born between 1946 and 1964.
Is Rosemary an old name?
Yes. Rosemary is older than 87 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Rosemary will be 37 in 2056, so its average age will actually fall, as the youngest Rosemarys make up more of the total.
Is Rosemary a boy or girl name?
Almost entirely girls: 99.8% of living Rosemarys are women.
Names the same age as Rosemary
NAME TWIN
Rosemary's name twin is Margaret. Of all 3,713 names on AgeByName, Margaret's age curve is the closest match to Rosemary's: 91% alike.
Other spellings: Rosemarie (62)
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Questions about the name Rosemary
How old is the average Rosemary?
The average Rosemary in the US is 58 years old. The median is 67, so half are older and half younger.
How many people are named Rosemary?
About 87,000 Rosemarys are alive in the US today, out of roughly 160,000 babies given the name since 1882.
When was the name Rosemary most popular?
In 1947, when about 4,500 baby girls were named Rosemary.
Is Rosemary a Boomer name?
Partly. Baby Boomers are the largest group, about 44% of living Rosemarys, 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