How old is someone named Lachlan?
The average Lachlan is 10 years old.
Half of all living Lachlans are between 5 and 14.
When was Lachlan popular?
Lachlan is a modern favorite: it climbed through the 2000s and hit its high in 2025. 477 babies got the name in 2025.
Popular names of 2025 · The most popular names of the 2020s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1950s | 16 | under 100 |
| 1960s | 5 | 0 |
| 1970s | 5 | 0 |
| 1980s | 31 | under 100 |
| 1990s | 190 | 190 |
| 2000s | 966 | 950 |
| 2010s | 2,840 | 2,800 |
| 2020s | 2,345 | 2,300 |
How many Lachlans are still alive?
About 6,300 Lachlans are alive in the US today. That's 99% of the roughly 6,400 babies named Lachlan since 1952.
Nearly every Lachlan ever born is still alive, because almost all of them are young.
What generation is the name Lachlan?
Three in four living Lachlans are in Gen Alpha, born in 2013 or later.
- Millennial 2%
- Gen Z 25%
- Gen Alpha 73%
Is Lachlan an old name?
No. Lachlan is one of the youngest names around: younger than 94 in 100 names on AgeByName.
Looking ahead: if babies keep getting the name at today's pace, the typical Lachlan will be 24 in 2056, so the name is aging slowly.
Is Lachlan a boy or girl name?
Mostly boys: 95.5% of living Lachlans are men.
Names the same age as Lachlan
NAME TWIN
Lachlan's name twin is Ronan. Of all 3,713 names on AgeByName, Ronan's age curve is the closest match to Lachlan's: 96% alike.
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Questions about the name Lachlan
How old is the average Lachlan?
The average Lachlan in the US is 10 years old. The median is 9, so half are older and half younger.
How many people are named Lachlan?
About 6,300 Lachlans are alive in the US today, out of roughly 6,400 babies given the name since 1952.
When was the name Lachlan most popular?
In 2025, when about 480 baby boys were named Lachlan.
Is Lachlan a Gen Alpha name?
Yes. About 73% of living Lachlans are in Gen Alpha, born in 2013 or later.
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