How Many People Are Named Mario Diaz?
There are approximately 157 people named Mario Diaz living in the United States today. That makes this name combination uncommon, occurring at a rate of about 1 in 2,183,149 Americans.
This estimate combines SSA birth records for the first name Mario with Census Bureau frequency data for the surname Diaz. 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
157
1 in 2,183,149 Americans
Combination Rarity
Uncommon
First Name
View full profileMario
Last Name
View full profileDiaz
Mario: Popularity Over Time
Year-by-year SSA birth registrations for the first name Mario. The peak year was 1980 with 2,974 births. The average person named Mario today is 38 years old.
Ancestry of the First Name Mario
In the 2020 Census, the first name Mario was most commonly recorded among people who identified as Hispanic (77.00%). The next largest recorded groups were White (12.24%) and Black (7.64%).
These percentages describe the people who had the first name Mario 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 Mario rose or fell over time.
Ancestry of the Diaz Surname
The surname Diaz 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 Diaz 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 "Mario" has an estimated frequency of 0.0384% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Diaz" appears at a rate of 119.41 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 Mario are likely to be alive now.
Multiplying these frequencies against the U.S. population of ~343 million gives 157 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Mario
Other people with the surname Diaz
Mario Diaz: Questions and Answers
How many people are named Mario Diaz?
We estimate approximately 157 people named Mario Diaz are alive in the United States today. The first name Mario is shared by 131,578 Americans, and the surname Diaz is shared by 409,278.
How rare is the name Mario Diaz?
This name combination is classified as Uncommon, occurring at a rate of about 1 in 2,183,149 Americans. The first name Mario is common and the surname Diaz is common.
Is Mario a male or female name?
Mario is predominantly male, with 99.3% of bearers being male and 0.7% female. It peaked in popularity in 1980 and the average bearer today is 38 years old.
What does the Census say about the first name Mario?
In the 2020 Census, the first name Mario was most commonly recorded among people who identified as Hispanic (77.00%). The next largest recorded groups were White (12.24%) and Black (7.64%). 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.
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