Explore the Family Name Koizumi

The meaning of Koizumi

Japanese: written 小泉 ‘small spring of water’. It is found mostly in eastern Japan, but is a topographic name nationwide. Several samurai families of various lineages took this surname from a number of villages by this name. Some characteristic forenames: Japanese Hiroshi, Hisako, Keiko, Koichi, Tadao, Takeshi, Yoko, Akira, Chiyo, Hiromichi, Hiroyuki, Ikuko.

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

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

Based on the Decennial U.S. Census, the surname Koizumi has experienced a slight increase in popularity over a decade. The data shows that in 2000, the surname was ranked 54,766th, and by 2010, it had climbed to 52,736th - a change of about 3.71%. In terms of the count, the numbers rose from 352 persons bearing the surname in 2000 to 393 in 2010, marking an 11.65% increase. However, the proportion of this surname per 100,000 population remained constant at 0.13.

	2000	2010	Change
Rank	#54,766	#52,736	3.71%
Count	352	393	11.65%
Proportion per 100k	0.13	0.13	0%

Race and Ethnicity of people with the last name Koizumi

Concerning ethnicity, the data from the Decennial U.S. Census reveals that the majority of individuals with the surname Koizumi identify as Asian/Pacific Islander. This group saw a minor decrease from 84.09% in 2000 to 83.21% in 2010. Those who identified as having two or more ethnic identities increased from 8.52% to 9.16% over the same period. The percentage of individuals with the Koizumi surname identifying as White also saw a slight rise, moving from 6.25% to 6.36%. There were no reported changes for those identifying as Hispanic, Black, or American Indian and Alaskan Native.

	2000	2010	Change
Asian/Pacific Islander	84.09%	83.21%	-1.05%
Two or More Races	8.52%	9.16%	7.51%
White	6.25%	6.36%	1.76%
Hispanic	0%	0%	0%
Black	0%	0%	0%
American Indian and Alaskan Native	0%	0%	0%