How Many People Are Named Gregory Sierra?
There are approximately 73 people named Gregory Sierra living in the United States today. That makes this name combination rare, occurring at a rate of about 1 in 4,695,265 Americans.
This estimate combines SSA birth records for the first name Gregory with Census Bureau frequency data for the surname Sierra. Below you will find a breakdown of both names, including popularity trends, gender data, and Census background data where it is available.
Estimated People with This Name
73
1 in 4,695,265 Americans
Combination Rarity
Rare
First Name
View full profileGregory
Last Name
View full profileSierra
Gregory: Popularity Over Time
Year-by-year SSA birth registrations for the first name Gregory. The peak year was 1962 with 22,058 births. The average person named Gregory today is 55 years old.
Ancestry of the First Name Gregory
In the 2020 Census, the first name Gregory was most commonly recorded among people who identified as White (77.52%). The next largest recorded groups were Black (14.70%) and Hispanic (4.03%).
These percentages describe the people who had the first name Gregory in the 2020 Census. They do not tell you the deeper origin or meaning of the name itself.
Read this as a snapshot of who already had the name in 2020, not as a trend line. The SSA chart above is still the better way to see how Gregory rose or fell over time.
Ancestry of the Sierra Surname
The surname Sierra was most commonly recorded among people who identified as Hispanic in the 2020 Census.
This is a self-reported race and ethnicity breakdown for people who had the surname Sierra in the published Census surname tables. It gives useful context around who was recorded with the name, but it does not tell the full family history of every Boone line.
How we calculated this
The first name "Gregory" has an estimated frequency of 0.176% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Sierra" appears at a rate of 12.02 per 100,000 people in the 2020 U.S. Census.
We do not use the Census first-name snapshot for the main estimate because it is only published once every 10 years. The latest public first-name Census file is from 2020, which is already 6 years old. SSA birth records plus CDC survival data give a better current estimate of how many people with the first name Gregory are likely to be alive now.
Multiplying these frequencies against the U.S. population of ~343 million gives 73 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Gregory
Other people with the surname Sierra
Gregory Sierra: Questions and Answers
How many people are named Gregory Sierra?
We estimate approximately 73 people named Gregory Sierra are alive in the United States today. The first name Gregory is shared by 603,591 Americans, and the surname Sierra is shared by 41,211.
How rare is the name Gregory Sierra?
This name combination is classified as Rare, occurring at a rate of about 1 in 4,695,265 Americans. The first name Gregory is very common and the surname Sierra is uncommon.
Is Gregory a male or female name?
Gregory is predominantly male, with 99.6% of bearers being male and 0.4% female. It peaked in popularity in 1962 and the average bearer today is 55 years old.
What does the Census say about the first name Gregory?
In the 2020 Census, the first name Gregory was most commonly recorded among people who identified as White (77.52%). The next largest recorded groups were Black (14.70%) and Hispanic (4.03%). These percentages describe the people who had the name in the 2020 Census, not the deeper origin of the name itself.
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. When available, first-name Census background data comes from the 2020 U.S. Census Bureau first-name tables. Surname data comes from the 2020 U.S. Census Bureau. Full methodology.
Try another name
How Many of Me