Johnny Duncan
There are approximately 100 people named Johnny Duncan living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 3,427,543 Americans.
This estimate combines SSA birth records for the first name Johnny with Census Bureau frequency data for the surname Duncan. Below you will find a breakdown of both names, including popularity trends, gender data, and Census demographics where available.
Expected bearers
100
1 in 3,427,543
Named Johnny
230K
Alive today
Named Duncan
149K
Alive today
US population
343M
Denominator
Estimated living: 230K
Rarity: Common
Gender: Male
Peak year: 1947
Average age: 56
Top Census group: White (46.6%)
Estimated bearers: 149K
Rarity: Common
Census rank: #222
Per 100K: 43.40
Top ancestry: White (72.9%)
First name trend
Johnny: popularity over time
Year-by-year SSA birth registrations for the first name Johnny. The peak year was 1947 with 7,498 births. The average person named Johnny today is 56 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Johnny
Self-reported race and ethnicity breakdown for people with the first name Johnny, from the 2020 US Census Bureau first-name tables. The largest published group is White at 46.6%.
The bar chart below shows how people with the first name Johnny 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 Johnny at the time of the Census. A first name does not determine a person's race or ethnicity.
- White46.6% · 85,258
- Black or African American22.3% · 40,845
- Hispanic or Latino20.9% · 38,349
- Asian and Pacific Islander6.1% · 11,158
- Two or more races2.8% · 5,135
- American Indian and Alaska Native1.3% · 2,366
Ethnicity
Ancestry of the Duncan surname
Self-reported race and ethnicity breakdown for people with the surname Duncan, from the 2020 US Census Bureau. The largest group is White at 72.9%.
The bar chart below shows how people with the surname Duncan 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 Duncan at the time of the Census. A surname does not determine a person's race or ethnicity.
- White72.9% · 94,619
- Black or African American17.3% · 22,472
- Two or more races4.6% · 5,925
- Hispanic or Latino3.6% · 4,634
- American Indian and Alaska Native1.0% · 1,244
- Asian and Pacific Islander0.6% · 814
Methodology
How we calculated this
The first name Johnny has a living-bearer frequency of 0.0670% of the US population, based on 229,751 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 Johnny right now.
The surname Duncan appears at a rate of 43.40 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0434%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 100 people with the full name Johnny Duncan. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Johnny
Related
Other people with the surname Duncan
FAQ
Johnny Duncan: questions and answers
How many people are named Johnny Duncan?
We estimate approximately 100 people in the United States share the full name Johnny Duncan. That works out to about 1 in 3,427,543 Americans. This is calculated by combining the first-name frequency (0.0670%) with the surname frequency (43.40 per 100K) against the current US population.
How rare is the name Johnny Duncan?
We classify Johnny Duncan as "Very Rare". About 1 in 3,427,543 Americans share this exact first and last name combination.
Is Johnny a male or female name?
Johnny is predominantly male. Out of 320,983 total SSA registrations, 98.8% were male and 1.2% were female. See the full Johnny 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 Johnny Duncan?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.