How Common Is the Surname Koo?
The surname Koo is the #6,843 most common last name in the United States, with an estimated 5,609 bearers. That's about 1 in 59,885 Americans. This data comes from the 2010 U.S. Census Bureau surname frequency tables.
This page covers the Koo 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 Koo.
Estimated Americans with this Surname
5,609
About 1 in 59,885 people in the U.S.
Census Rank
#6,843
Frequency Rate
1.67
per 100,000 people
Census Count
4,923
2010 Census
Data Source
2010
U.S. Census Bureau
Ancestry and Ethnicity for Koo
The Koo surname is most commonly associated with people who identify as Asian/Pacific Islander (90.72%). The next largest groups are White (4.81%) and Two or More Races (2.15%).
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 ... Koo?
Pair the Koo surname with a first name to estimate how many people share that full name in the United States.
Koo Surname: Questions and Answers
How common is the last name Koo?
Koo is the #6,843 most common surname in the United States, with an estimated 5,609 people sharing this last name. It appears at a rate of 1.67 per 100,000 Americans.
What ethnicity is the surname Koo?
The Koo surname is most commonly associated with people who identify as Asian/Pacific Islander (90.72%). The next largest groups are White (4.81%) and Two or More Races (2.15%). 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] Koo are there?
We can estimate any first + last name combination. Popular examples: Michael Koo, James Koo, John Koo. 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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