How Many People Are Named Lachlan?
An estimated 5,866 people in the United States have the first name Lachlan. It is predominantly male (95.3%). The average bearer is 11 years old, and Lachlan peaked in popularity in 2024 with 401 births that year.
Below you will find a full statistical profile of Lachlan as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Lachlan paired with any surname.
Key Insights
- While Lachlan is overwhelmingly male, 281 female births have been registered with this name since 1880.
- Lachlan is a modern name. With an average bearer age of just 11, it has gained most of its popularity in recent years.
Estimated Living Americans
5,866
About 1 in 58,431 people in the U.S.
Rarity
Rare
Predicted Gender
Male
95.3% confidence
Average Age
11
years old
Peak Year
2024
401 births
Total Registered
5,921
since 1880
Gender Distribution for Lachlan
Lachlan is predominantly male (95.3%), though 281 female births have been registered. It functions as a unisex name for a small percentage of bearers.
Lachlan as a male name
Ranked #691 in 2024
389 male births in 2024
Peak: 2024 (389 births)
Lachlan as a female name
Ranked #8,692 in 2024
12 female births in 2024
Peak: 2020 (23 births)
Lachlan: Popularity Over Time
SSA records for Lachlan span from the 1950s to the 2020s, covering 8 decades of naming data. The most popular decade for this name was the 2010s, when 2,840 babies were registered. While Lachlan is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Lachlan by Decade
How has Lachlan tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Lachlan by State
Birth registrations for Lachlan span all 40 states and territories in the SSA database. The highest counts are in California, New York, Washington. The lowest are in New Mexico, Maine, Alabama. On average, about 104 Lachlans were registered per state.
Lachlan + Last Name Combinations
How many people share a full name with Lachlan as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Lachlan
Other first names starting with L with a similar number of bearers.
Lachlan: Questions and Answers
How many people in the U.S. are named Lachlan?
We estimate approximately 5,866 people named Lachlan are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 58,431 Americans share this first name.
Is Lachlan a common name?
Lachlan is classified as "Rare" and is more popular than 96.9% of all first names in the SSA database. A total of 5,921 births have been registered with this name since 1880.
When was Lachlan most popular?
Lachlan reached peak popularity in 2024, when 401 babies were given this name. The average age of a living person named Lachlan is approximately 11 years old, reflecting when the name was most commonly given.
Is Lachlan a male name?
Lachlan is predominantly male. 95.3% of people with this name are male. See the gender breakdown above for full details.
How many Lachlan Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Lachlan Smith, Lachlan Johnson, Lachlan Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
Search for a full name combination
How Many of Me