How Many People Are Named Duffy?
An estimated 452 people in the United States have the first name Duffy. It is predominantly male (97.5%). The average bearer is 59 years old, and Duffy peaked in popularity in 1961 with 26 births that year.
Below you will find a full statistical profile of Duffy as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Duffy paired with any surname.
Estimated Living Americans
452
About 1 in 758,306 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
97.5% confidence
Average Age
59
years old
Peak Year
1961
26 births
Total Registered
643
since 1880
Gender Distribution for Duffy
Duffy is predominantly male (97.5%), though 16 female births have been registered. It functions as a unisex name for a small percentage of bearers.
Duffy as a male name
Ranked #12,790 in 2012
5 male births in 2012
Peak: 1969 (22 births)
Duffy as a female name
Ranked #7,323 in 1970
6 female births in 1970
Peak: 1970 (6 births)
Duffy: Popularity Over Time
SSA records for Duffy span from the 1910s to the 2010s, covering 10 decades of naming data. The most popular decade for this name was the 1950s, when 141 babies were registered. Duffy has declined significantly from its peak in the 1950s. Recent registrations are a fraction of what they were at the name's height.
Duffy by Decade
How has Duffy tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Duffy by State
Duffy + Last Name Combinations
How many people share a full name with Duffy as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Duffy
Other first names starting with D with a similar number of bearers.
Duffy: Questions and Answers
How many people in the U.S. are named Duffy?
We estimate approximately 452 people named Duffy are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 758,306 Americans share this first name.
Is Duffy a common name?
Duffy is classified as "Very Rare" and is more popular than 83.6% of all first names in the SSA database. A total of 643 births have been registered with this name since 1880.
When was Duffy most popular?
Duffy reached peak popularity in 1961, when 26 babies were given this name. The average age of a living person named Duffy is approximately 59 years old, reflecting when the name was most commonly given.
Is Duffy a male name?
Duffy is predominantly male. 97.5% of people with this name are male. See the gender breakdown above for full details.
How many Duffy Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Duffy Smith, Duffy Johnson, Duffy Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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