Troy Duffy
There are approximately 23 people named Troy Duffy living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 14,902,363 Americans.
This estimate combines SSA birth records for the first name Troy with Census Bureau frequency data for the surname Duffy. Below you will find a breakdown of both names, including popularity trends, gender data, and Census demographics where available.
Expected bearers
23
1 in 14,902,363
Named Troy
185K
Alive today
Named Duffy
43K
Alive today
US population
343M
Denominator
Estimated living: 185K
Rarity: Common
Gender: Male
Peak year: 1970
Average age: 46
Top Census group: White (74.1%)
Estimated bearers: 43K
Rarity: Uncommon
Census rank: #915
Per 100K: 12.56
Top ancestry: White (88.1%)
First name trend
Troy: popularity over time
Year-by-year SSA birth registrations for the first name Troy. The peak year was 1970 with 8,545 births. The average person named Troy today is 46 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Troy
Self-reported race and ethnicity breakdown for people with the first name Troy, from the 2020 US Census Bureau first-name tables. The largest published group is White at 74.1%.
The bar chart below shows how people with the first name Troy 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 Troy at the time of the Census. A first name does not determine a person's race or ethnicity.
- White74.1% · 120,515
- Black or African American14.7% · 23,976
- Hispanic or Latino4.6% · 7,445
- Two or more races4.1% · 6,587
- Asian and Pacific Islander1.6% · 2,618
- American Indian and Alaska Native0.9% · 1,458
Ethnicity
Ancestry of the Duffy surname
Self-reported race and ethnicity breakdown for people with the surname Duffy, from the 2020 US Census Bureau. The largest group is White at 88.1%.
The bar chart below shows how people with the surname Duffy 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 Duffy at the time of the Census. A surname does not determine a person's race or ethnicity.
- White88.1% · 33,089
- Black or African American4.1% · 1,537
- Hispanic or Latino3.6% · 1,348
- Two or more races2.8% · 1,056
- Asian and Pacific Islander0.9% · 350
- American Indian and Alaska Native0.5% · 176
Methodology
How we calculated this
The first name Troy has a living-bearer frequency of 0.0541% of the US population, based on 185,392 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 Troy right now.
The surname Duffy appears at a rate of 12.56 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0126%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 23 people with the full name Troy Duffy. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Troy
Related
Other people with the surname Duffy
FAQ
Troy Duffy: questions and answers
How many people are named Troy Duffy?
We estimate approximately 23 people in the United States share the full name Troy Duffy. That works out to about 1 in 14,902,363 Americans. This is calculated by combining the first-name frequency (0.0541%) with the surname frequency (12.56 per 100K) against the current US population.
How rare is the name Troy Duffy?
We classify Troy Duffy as "Very Rare". About 1 in 14,902,363 Americans share this exact first and last name combination.
Is Troy a male or female name?
Troy is predominantly male. Out of 218,410 total SSA registrations, 98.8% were male and 1.2% were female. See the full Troy 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 named Troy Duffy?
Our sister site HowManyOfMe.org answers how many people are called Troy Duffy at a glance, with the living-bearer count up front.