Leo Mckern
There are approximately 1 people named Leo Mckern 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 Leo with Census Bureau frequency data for the surname Mckern. Below you will find a breakdown of both names, including popularity trends, gender data, and Census demographics where available.
Expected bearers
1
1 in 342,754,338
Named Leo
145K
Alive today
Named Mckern
580
Alive today
US population
343M
Denominator
Estimated living: 145K
Rarity: Common
Gender: Male
Peak year: 2022
Average age: 28
Top Census group: White (60.1%)
Estimated bearers: 580
Rarity: Very Rare
Census rank: #45,537
Per 100K: 0.17
Top ancestry: White (91.9%)
First name trend
Leo: popularity over time
Year-by-year SSA birth registrations for the first name Leo. The peak year was 2022 with 8,322 births. The average person named Leo today is 28 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Leo
Self-reported race and ethnicity breakdown for people with the first name Leo, from the 2020 US Census Bureau first-name tables. The largest published group is White at 60.1%.
The bar chart below shows how people with the first name 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 name Leo at the time of the Census. A first name does not determine a person's race or ethnicity.
- White60.1% · 71,109
- Hispanic or Latino21.5% · 25,432
- Asian and Pacific Islander6.8% · 8,079
- Black or African American6.5% · 7,735
- Two or more races4.1% · 4,898
- American Indian and Alaska Native0.9% · 1,099
Ethnicity
Ancestry of the Mckern surname
Self-reported race and ethnicity breakdown for people with the surname Mckern, from the 2020 US Census Bureau. The largest group is White at 91.9%.
The bar chart below shows how people with the surname Mckern 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 Mckern at the time of the Census. A surname does not determine a person's race or ethnicity.
- White91.9% · 465
- Two or more races4.3% · 22
- Hispanic or Latino3.4% · 17
- Black or African American0.4% · 2
Methodology
How we calculated this
The first name Leo has a living-bearer frequency of 0.0423% of the US population, based on 144,829 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 Leo right now.
The surname Mckern appears at a rate of 0.17 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0002%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 1 people with the full name Leo Mckern. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Leo
FAQ
Leo Mckern: questions and answers
How many people are named Leo Mckern?
We estimate approximately 1 people in the United States share the full name Leo Mckern. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.0423%) with the surname frequency (0.17 per 100K) against the current US population.
How rare is the name Leo Mckern?
We classify Leo Mckern as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Leo a male or female name?
Leo is predominantly male. Out of 253,873 total SSA registrations, 99.2% were male and 0.8% were female. See the full Leo 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 common is the name Leo Mckern?
See how common the name Leo Mckern is on HowManyOfMe.org, our sister site built around that single question.