How Many People Are Named Alastair?
An estimated 1,256 people in the United States have the first name Alastair. It is almost exclusively a male name. The average bearer is 19 years old, and Alastair peaked in popularity in 2019 with 62 births that year.
Below you will find a full statistical profile of Alastair 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 Alastair paired with any surname.
Estimated Living Americans
1,256
About 1 in 272,894 people in the U.S.
Rarity
Rare
Predicted Gender
Male
100.0% confidence
Average Age
19
years old
Peak Year
2019
62 births
Total Registered
1,297
since 1880
Gender Distribution for Alastair
Alastair is almost exclusively a male name. Out of 1,297 total births registered, 100.0% were male.
Alastair as a male name
Ranked #2,364 in 2024
59 male births in 2024
Peak: 2019 (62 births)
Alastair: Popularity Over Time
SSA records for Alastair span from the 1920s to the 2020s, covering 9 decades of naming data. The most popular decade for this name was the 2010s, when 420 babies were registered. While Alastair is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Alastair by Decade
How has Alastair 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.
Alastair by State
Birth registrations for Alastair span all 9 states and territories in the SSA database. The highest counts are in California, Texas, Colorado. The lowest are in Washington, Ohio, New York. On average, about 16 Alastairs were registered per state.
Alastair + Last Name Combinations
How many people share a full name with Alastair as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Alastair
Other first names starting with A with a similar number of bearers.
Alastair: Questions and Answers
How many people in the U.S. are named Alastair?
We estimate approximately 1,256 people named Alastair 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 272,894 Americans share this first name.
Is Alastair a common name?
Alastair is classified as "Rare" and is more popular than 91.5% of all first names in the SSA database. A total of 1,297 births have been registered with this name since 1880.
When was Alastair most popular?
Alastair reached peak popularity in 2019, when 62 babies were given this name. The average age of a living person named Alastair is approximately 19 years old, reflecting when the name was most commonly given.
Is Alastair a male name?
Alastair is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Alastair Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Alastair Smith, Alastair Johnson, Alastair 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.
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