Last Names

Surnames / K

Koo

How common is the last name Koo?

About this name

We do not yet have a written origin for Koo, so here is what the census records show.

Surname origins are rarely settled, and we would rather say nothing than guess. The sources below are the best places to look, and our guide to how surnames began explains the usual types.

Similar spellings

Names nearby in the census

#6,843

Koo was the 6,843rd most common surname in the 2010 US Census, with 4,923 people, about 1.6 in every 100,000.

Who carries it

  • White (non-Hispanic)4.8%
  • Hispanic or Latino1.9%
  • Black (non-Hispanic)<0.1%
  • Asian or Pacific Islander90.7%
  • Two or more races2.1%
  • American Indian or Alaska Native<0.1%

Check the sources

For a name you are serious about, compare the dictionaries: Reaney and Wilson, A Dictionary of English Surnames; Hanks, Dictionary of American Family Names.