How Many People Are Named Duncan Johnson?
There are approximately 114 people named Duncan Johnson living in the United States today. That makes this name combination uncommon, occurring at a rate of about 1 in 3,006,617 Americans.
This estimate combines SSA birth records for the first name Duncan with Census Bureau frequency data for the surname Johnson. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Estimated People with This Name
114
1 in 3,006,617 Americans
Combination Rarity
Uncommon
First Name
View full profileDuncan
Last Name
View full profileJohnson
Duncan: Popularity Over Time
Year-by-year SSA birth registrations for the first name Duncan. The peak year was 1997 with 644 births. The average person named Duncan today is 34 years old.
Ancestry of the Johnson Surname
Self-reported race and ethnicity breakdown for people with the surname Johnson, from the 2010 U.S. Census Bureau.
How we calculated this
The first name "Duncan" has an estimated frequency of < 0.0001% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Johnson" appears at a rate of 655.24 per 100,000 people in the 2010 U.S. Census.
Multiplying these frequencies against the U.S. population of ~343 million gives 114 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Duncan
Other people with the surname Johnson
Duncan Johnson: Questions and Answers
How many people are named Duncan Johnson?
We estimate approximately 114 people named Duncan Johnson are alive in the United States today. The first name Duncan is shared by 17,392 Americans, and the surname Johnson is shared by 2,200,907.
How rare is the name Duncan Johnson?
This name combination is classified as Uncommon, occurring at a rate of about 1 in 3,006,617 Americans. The first name Duncan is uncommon and the surname Johnson is very common.
Is Duncan a male or female name?
Duncan is predominantly male, with 99.9% of bearers being male and 0.1% female. It peaked in popularity in 1997 and the average bearer today is 34 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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