John Mccarthy
There are approximately 827 people named John Mccarthy living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 414,455 Americans.
This estimate combines SSA birth records for the first name John with Census Bureau frequency data for the surname Mccarthy. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Expected bearers
827
1 in 414,455
Named John
2.9M
Alive today
Named Mccarthy
96K
Alive today
US population
343M
Denominator
Estimated living: 2.9M
Rarity: Very Common
Gender: Male
Peak year: 1947
Average age: 57
Estimated bearers: 96K
Rarity: Uncommon
Census rank: #384
Per 100K: 28.12
Top ancestry: White (92.3%)
First name trend
John: popularity over time
Year-by-year SSA birth registrations for the first name John. The peak year was 1947 with 88,524 births. The average person named John today is 57 years old.
Babies born per year
Ethnicity
Ancestry of the Mccarthy surname
Self-reported race and ethnicity breakdown for people with the surname Mccarthy, from the 2010 US Census Bureau. The largest group is White at 92.3%.
- White92.3%
- Black or African American3.3%
- Hispanic or Latino2.2%
- Two or more races1.3%
- Asian and Pacific Islander0.7%
- American Indian and Alaska Native0.3%
Methodology
How we calculated this
The first name John has a living-bearer frequency of 0.8581% of the US population, based on 2,941,241 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Mccarthy appears at a rate of 28.12 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0281%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 827 people with the full name John Mccarthy. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named John
Related
Other people with the surname Mccarthy
FAQ
John Mccarthy: questions and answers
How many people are named John Mccarthy?
We estimate approximately 827 people in the United States share the full name John Mccarthy. That works out to about 1 in 414,455 Americans. This is calculated by combining the first-name frequency (0.8581%) with the surname frequency (28.12 per 100K) against the current US population.
How rare is the name John Mccarthy?
We classify John Mccarthy as "Very Rare". About 1 in 414,455 Americans share this exact first and last name combination.
Is John a male or female name?
John is predominantly male. Out of 5,196,210 total SSA registrations, 99.6% were male and 0.4% were female. See the full John 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 2010 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.