Lachlan Boy
How popular is Lachlan?
#606 boy name in 2025
468 baby boys were named Lachlan in the US in 2025, making it the 606th most popular boy name. Another 9 girls got the name (#10,104 for girls).
Lachlan popularity over time
Boys Girls
| Rank in 2025 | #606 for boys (▲ 89 from 2024) |
|---|---|
| Babies in 2025 | 468 boys, 9 girls |
| 10-year trend | Rising fast (+50% babies vs 2015) |
| Earlier ranks | #767 in 2015, #705 in 2020 |
| Peak year | 2025 (468 boys) |
| Highest rank | #606 in 2025 |
| First recorded | 1952 |
| Boys vs girls (last 10 years) | 96% boys, 4% girls |
| Chance a classmate shares it | 0.3% in a class of 25 kids born in 2025 |
Lachlan counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Lachlan family of names ranked #577 for boys in 2025 (#652 the year before), with 479 babies in all.
| Spelling | Boys in 2025 | Share |
|---|---|---|
| Lachlan | 468 | 98% |
| Lachlann | 11 | 2% |
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Where Lachlan is most popular
Babies named Lachlan per 1,000 boys born in each state, 2021 to 2025. Darker means more common.
- Montana: 0.7 per 1,000 (12 boys)
- Colorado: 0.6 per 1,000 (78 boys)
- Washington: 0.6 per 1,000 (97 boys)
- Minnesota: 0.6 per 1,000 (68 boys)
- Oregon: 0.5 per 1,000 (41 boys)
Lachlan by decade
| Decade | Baby boys | Best rank |
|---|---|---|
| 1950s | 16 | #3,618 |
| 1960s | 5 | #4,038 |
| 1970s | 5 | #4,722 |
| 1980s | 31 | #4,521 |
| 1990s | 185 | #1,954 |
| 2000s | 920 | #1,186 |
| 2010s | 2,697 | #687 |
| 2020s | 2,249 | #606 |
Boy names about as popular as Lachlan
Questions
- Is Lachlan a boy or girl name?
- Lachlan is mostly a boy name. Over the last 10 years, 96% of babies named Lachlan were boys.
- How popular is the name Lachlan?
- 468 baby boys were named Lachlan in the US in 2025, making it the 606th most popular boy name. Another 9 girls got the name (#10,104 for girls).
- When was Lachlan most popular?
- Lachlan peaked in 2025, when 468 boys were given the name. Its highest rank was #606 in 2025.
- How many people are named Lachlan?
- 6,398 babies have been named Lachlan in the US since 1880. We estimate about 6,346 of them are alive in 2026, with a median age of 9.
- Where is Lachlan most popular?
- From 2021 to 2025, Lachlan was most common in Montana, at 0.7 of every 1,000 boys born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.