How Many People Are Named Sirius Black?
There are approximately 1 people named Sirius Black living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 342,754,338 Americans.
This estimate combines SSA birth records for the first name Sirius with Census Bureau frequency data for the surname Black. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Estimated People with This Name
1
1 in 342,754,338 Americans
Combination Rarity
Very Rare
First Name
View full profileSirius
Last Name
View full profileBlack
Sirius: Popularity Over Time
Year-by-year SSA birth registrations for the first name Sirius. The peak year was 2022 with 61 births. The average person named Sirius today is 10 years old.
Ancestry of the Black Surname
Self-reported race and ethnicity breakdown for people with the surname Black, from the 2010 U.S. Census Bureau.
How we calculated this
The first name "Sirius" has an estimated frequency of < 0.0001% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Black" appears at a rate of 52.46 per 100,000 people in the 2010 U.S. Census.
Multiplying these frequencies against the U.S. population of ~343 million gives 1 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people with the surname Black
Sirius Black: Questions and Answers
How many people are named Sirius Black?
We estimate approximately 1 people named Sirius Black are alive in the United States today. The first name Sirius is shared by 689 Americans, and the surname Black is shared by 176,210.
How rare is the name Sirius Black?
This name combination is classified as Very Rare, occurring at a rate of about 1 in 342,754,338 Americans. The first name Sirius is very rare and the surname Black is common.
Is Sirius a male or female name?
Sirius is predominantly male, with 99.3% of bearers being male and 0.7% female. It peaked in popularity in 2022 and the average bearer today is 10 years old.
Where does this data come from?
First name data comes from the Social Security Administration (1880 to 2024), adjusted for survival using CDC 2023 life tables. Surname data comes from the 2010 U.S. Census Bureau. Full methodology.
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