How old is someone named Petra?
The average Petra is 40 years old.
Half of all living Petras are between 16 and 62. The average sits between a large young group and an older one, so many Petras are much younger than 40.
When was Petra popular?
Petra is a steady name: popular for generations, with a peak in 1927 but no single era. You'll meet Petras of every age.
Popular names of 1927 · The most popular names of the 1920s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 407 | 0 |
| 1910s | 1,012 | 0 |
| 1920s | 1,822 | under 100 |
| 1930s | 1,325 | 270 |
| 1940s | 1,065 | 610 |
| 1950s | 1,059 | 830 |
| 1960s | 1,260 | 1,100 |
| 1970s | 1,170 | 1,100 |
| 1980s | 883 | 850 |
| 1990s | 828 | 810 |
| 2000s | 1,046 | 1,000 |
| 2010s | 1,433 | 1,400 |
| 2020s | 923 | 920 |
How many Petras are still alive?
About 9,000 Petras are alive in the US today. That's 61% of the roughly 15,000 babies named Petra since 1881.
Roughly half of all Petras ever born are still living.
What generation is the name Petra?
About one in four living Petras are in Gen Alpha, born in 2013 or later.
Is Petra an old name?
Somewhat. Petra is older than 67 in 100 names on AgeByName, but younger than plenty of classics.
Looking ahead: if babies keep getting the name at today's pace, the typical Petra will be 39 in 2056, about the same as today.
Is Petra a boy or girl name?
Almost entirely girls: 99.8% of living Petras are women.
Names the same age as Petra
NAME TWIN
Petra's name twin is Hiram. Of all 3,713 names on AgeByName, Hiram's age curve is the closest match to Petra's: 92% alike.
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Questions about the name Petra
How old is the average Petra?
The average Petra in the US is 40 years old. The median is 40, so half are older and half younger.
How many people are named Petra?
About 9,000 Petras are alive in the US today, out of roughly 15,000 babies given the name since 1881.
When was the name Petra most popular?
In 1927, when about 210 baby girls were named Petra.
Is Petra a Gen Alpha name?
Partly. Gen Alpha are the largest group, about 22% of living Petras, 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