How Many People Are Named James Duncan?
There are approximately 1,440 people named James Duncan living in the United States today. That makes this name combination common, occurring at a rate of about 1 in 238,024 Americans.
This estimate combines SSA birth records for the first name James with Census Bureau frequency data for the surname Duncan. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Estimated People with This Name
1,440
1 in 238,024 Americans
Combination Rarity
Common
First Name
View full profileJames
Last Name
View full profileDuncan
James: Popularity Over Time
Year-by-year SSA birth registrations for the first name James. The peak year was 1947 with 95,020 births. The average person named James today is 57 years old.
Ancestry of the Duncan Surname
Self-reported race and ethnicity breakdown for people with the surname Duncan, from the 2010 U.S. Census Bureau.
How we calculated this
The first name "James" has an estimated frequency of 0.917% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Duncan" appears at a rate of 45.83 per 100,000 people in the 2010 U.S. Census.
Multiplying these frequencies against the U.S. population of ~343 million gives 1,440 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named James
Other people with the surname Duncan
James Duncan: Questions and Answers
How many people are named James Duncan?
We estimate approximately 1,440 people named James Duncan are alive in the United States today. The first name James is shared by 3,142,267 Americans, and the surname Duncan is shared by 153,940.
How rare is the name James Duncan?
This name combination is classified as Common, occurring at a rate of about 1 in 238,024 Americans. The first name James is very common and the surname Duncan is common.
Is James a male or female name?
James is predominantly male, with 99.5% of bearers being male and 0.5% female. It peaked in popularity in 1947 and the average bearer today is 57 years old.
Where does this data come from?
First name data comes from the Social Security Administration (1880 to 2024), adjusted for survival using CDC 2023 life tables. Surname data comes from the 2010 U.S. Census Bureau. Full methodology.
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