Troy Duffy
There are approximately 24 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 14,281,431 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 ancestry information.
Expected bearers
24
1 in 14,281,431
Named Troy
185K
Alive today
Named Duffy
45K
Alive today
US population
343M
Denominator
Estimated living: 185K
Rarity: Common
Gender: Male
Peak year: 1970
Average age: 46
Estimated bearers: 45K
Rarity: Uncommon
Census rank: #892
Per 100K: 13.17
Top ancestry: White (90.7%)
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
Ethnicity
Ancestry of the Duffy surname
Self-reported race and ethnicity breakdown for people with the surname Duffy, from the 2010 US Census Bureau. The largest group is White at 90.7%.
- White90.7%
- Black or African American4.3%
- Hispanic or Latino2.3%
- Two or more races1.6%
- Asian and Pacific Islander0.7%
- American Indian and Alaska Native0.5%
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).
The surname Duffy appears at a rate of 13.17 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0132%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 24 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 24 people in the United States share the full name Troy Duffy. That works out to about 1 in 14,281,431 Americans. This is calculated by combining the first-name frequency (0.0541%) with the surname frequency (13.17 per 100K) against the current US population.
How rare is the name Troy Duffy?
We classify Troy Duffy as "Very Rare". About 1 in 14,281,431 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 2010 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.