How old is someone named Sonja?
The average Sonja is 56 years old.
Half of all living Sonjas are between 48 and 66.
When was Sonja popular?
Sonja peaked in 1967 and has been given less and less ever since. Only 37 babies got the name in 2025.
Popular names of 1967 · The most popular names of the 1960s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 6 | 0 |
| 1910s | 89 | 0 |
| 1920s | 231 | 0 |
| 1930s | 3,153 | 990 |
| 1940s | 5,086 | 2,800 |
| 1950s | 4,619 | 3,600 |
| 1960s | 10,976 | 9,700 |
| 1970s | 7,977 | 7,500 |
| 1980s | 3,240 | 3,100 |
| 1990s | 1,695 | 1,700 |
| 2000s | 1,187 | 1,200 |
| 2010s | 956 | 950 |
| 2020s | 342 | 340 |
How many Sonjas are still alive?
About 32,000 Sonjas are alive in the US today. That's 80% of the roughly 40,000 babies named Sonja since 1906.
Most Sonjas ever born are still alive.
What generation is the name Sonja?
About two in five living Sonjas are Gen Xers, born between 1965 and 1980.
Is Sonja an old name?
Yes. Sonja is older than 84 in 100 names on AgeByName.
Is Sonja a boy or girl name?
Almost entirely girls: 99.9% of living Sonjas are women.
Names the same age as Sonja
NAME TWIN
Sonja's name twin is Karin. Of all 3,713 names on AgeByName, Karin's age curve is the closest match to Sonja's: 88% alike.
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Questions about the name Sonja
How old is the average Sonja?
The average Sonja in the US is 56 years old. The median is 58, so half are older and half younger.
How many people are named Sonja?
About 32,000 Sonjas are alive in the US today, out of roughly 40,000 babies given the name since 1906.
When was the name Sonja most popular?
In 1967, when about 1,300 baby girls were named Sonja.
Is Sonja a Gen X name?
Partly. Gen X are the largest group, about 43% of living Sonjas, 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