How Common Is the Surname Duncan?
The surname Duncan is the #212 most common last name in the United States, with an estimated 153,940 bearers. That's about 1 in 2,182 Americans. This data comes from the 2010 U.S. Census Bureau surname frequency tables.
This page covers the Duncan surname's frequency in the U.S. population, its rank among all American surnames, and a breakdown of ancestry and ethnicity data from the Census. You can also check how many people share any first + last name combination involving Duncan.
Estimated Americans with this Surname
153,940
About 1 in 2,182 people in the U.S.
Census Rank
#212
Frequency Rate
45.83
per 100,000 people
Census Count
135,187
2010 Census
Data Source
2010
U.S. Census Bureau
Ancestry and Ethnicity for Duncan
The Duncan surname is most commonly associated with people who identify as White (76.39%). The next largest groups are Black (17.33%) and Hispanic (2.55%).
Self-reported race and ethnicity from the 2010 U.S. Census Bureau surname tables. Some categories may be suppressed for privacy when sample sizes are small.
How Many People Are Named ... Duncan?
Pair the Duncan surname with a first name to estimate how many people share that full name in the United States.
Duncan Surname: Questions and Answers
How common is the last name Duncan?
Duncan is the #212 most common surname in the United States, with an estimated 153,940 people sharing this last name. It appears at a rate of 45.83 per 100,000 Americans.
What ethnicity is the surname Duncan?
The Duncan surname is most commonly associated with people who identify as White (76.39%). The next largest groups are Black (17.33%) and Hispanic (2.55%). This data comes from the 2010 U.S. Census Bureau surname tables, which include self-reported race and ethnicity breakdowns.
How many people named [First Name] Duncan are there?
We can estimate any first + last name combination. Popular examples: Michael Duncan, James Duncan, John Duncan. Search any combination on our homepage.
Where does this surname data come from?
Surname frequency data comes from the 2010 U.S. Census Bureau decennial surname tables. These list every surname appearing in the Census along with frequency rates and demographic breakdowns. Full methodology.
Search for a full name combination
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