Calvin Leo
There are approximately 4 people named Calvin Leo living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 85,688,585 Americans.
This estimate combines SSA birth records for the first name Calvin with Census Bureau frequency data for the surname Leo. Below you will find a breakdown of both names, including popularity trends, gender data, and Census demographics where available.
Expected bearers
4
1 in 85,688,585
Named Calvin
152K
Alive today
Named Leo
9.3K
Alive today
US population
343M
Denominator
Estimated living: 152K
Rarity: Common
Gender: Male
Peak year: 1924
Average age: 42
Top Census group: White (50.2%)
Estimated bearers: 9.3K
Rarity: Rare
Census rank: #4,233
Per 100K: 2.71
Top ancestry: White (70.3%)
First name trend
Calvin: popularity over time
Year-by-year SSA birth registrations for the first name Calvin. The peak year was 1924 with 4,941 births. The average person named Calvin today is 42 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Calvin
Self-reported race and ethnicity breakdown for people with the first name Calvin, from the 2020 US Census Bureau first-name tables. The largest published group is White at 50.2%.
The bar chart below shows how people with the first name Calvin described their own race and ethnicity on the 2020 Census form. These are self-reported numbers, and they describe the population who happened to carry the name Calvin at the time of the Census. A first name does not determine a person's race or ethnicity.
- White50.2% · 62,616
- Black or African American33.4% · 41,720
- Asian and Pacific Islander6.8% · 8,513
- Two or more races4.3% · 5,371
- Hispanic or Latino4.1% · 5,080
- American Indian and Alaska Native1.2% · 1,462
Ethnicity
Ancestry of the Leo surname
Self-reported race and ethnicity breakdown for people with the surname Leo, from the 2020 US Census Bureau. The largest group is White at 70.3%.
The bar chart below shows how people with the surname Leo described their own race and ethnicity on the 2020 Census form. These are self-reported numbers, and they describe the population who happened to carry the surname Leo at the time of the Census. A surname does not determine a person's race or ethnicity.
- White70.3% · 5,686
- Hispanic or Latino10.7% · 863
- Asian and Pacific Islander9.9% · 802
- Black or African American5.0% · 406
- Two or more races3.4% · 279
- American Indian and Alaska Native0.7% · 56
Methodology
How we calculated this
The first name Calvin has a living-bearer frequency of 0.0444% of the US population, based on 152,192 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
Even though the Census Bureau now publishes first-name tables, we do not use that file as the main first-name input for this estimate. The latest first-name Census snapshot is from 2020, which makes it 6 years old today. Because Census first-name data is only released once every 10 years, SSA birth records plus CDC survival rates give a better current estimate of how many people are likely alive with the name Calvin right now.
The surname Leo appears at a rate of 2.71 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0027%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 4 people with the full name Calvin Leo. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Calvin
FAQ
Calvin Leo: questions and answers
How many people are named Calvin Leo?
We estimate approximately 4 people in the United States share the full name Calvin Leo. That works out to about 1 in 85,688,585 Americans. This is calculated by combining the first-name frequency (0.0444%) with the surname frequency (2.71 per 100K) against the current US population.
How rare is the name Calvin Leo?
We classify Calvin Leo as "Very Rare". About 1 in 85,688,585 Americans share this exact first and last name combination.
Is Calvin a male or female name?
Calvin is predominantly male. Out of 219,556 total SSA registrations, 99.4% were male and 0.6% were female. See the full Calvin profile for detailed gender data.
Where does this data come from?
First-name data comes from the Social Security Administration's national baby name files (1880 to 2024). Surname data comes from the 2020 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.
How many people are called Calvin Leo?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.