Explore the Family Name Kooi

The meaning of Kooi

Dutch: from Middle Dutch kooye ‘decoy, cage, fold’, a metonymic occupational name for a maker of cages or decoys or for someone who caught ducks by decoying them.

Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.

How common is the last name Kooi in the United States?

Based on the Decennial U.S. Census data, the surname Kooi has seen a rise in popularity from 2000 to 2010. In 2000, the name ranked 39,304th but improved its position to 35,016th by 2010, reflecting an increase of about 10.91%. The count of individuals with the surname also rose from 527 in 2000 to 644 in 2010, marking a substantial growth rate of 22.2%. This surge is mirrored in the proportion per 100k people which saw an increment from 0.2 in 2000 to 0.22 in 2010, a 10% jump.

	2000	2010	Change
Rank	#39,304	#35,016	10.91%
Count	527	644	22.2%
Proportion per 100k	0.2	0.22	10%

Race and Ethnicity of people with the last name Kooi

In terms of ethnicity based on the same Decennial U.S. Census data, there has been noticeable fluctuation between 2000 and 2010. The number of individuals identifying as Asian/Pacific Islander with the last name Kooi dropped significantly from 2.47% in 2000 to 1.40% in 2010, a decline of approximately 43.32%. Meanwhile, those identifying under two or more races saw a minor increase from 2.28% to 2.48%. White individuals held the majority with the surname Kooi, increasing slightly from 93.36% in 2000 to 94.57% in 2010. Individuals identifying as Hispanic decreased from 1.33% to 0.78%, while those identifying as Black increased from 0% to 0.78%. There was no change for American Indian and Alaskan Native identities during this period.

	2000	2010	Change
White	93.36%	94.57%	1.3%
Two or More Races	2.28%	2.48%	8.77%
Asian/Pacific Islander	2.47%	1.4%	-43.32%
Hispanic	1.33%	0.78%	-41.35%
Black	0%	0.78%	0%
American Indian and Alaskan Native	0%	0%	0%