Explore the Family Name Koyama
The meaning of Koyama
Japanese: written 小山 ‘small mountain’. Another common pronunciation is Oyama; both are found throughout Japan, as are several locations by this name. Many descend from Fujiwara no Hidesato (10th century), of the northern branch of the Fujiwara clan. Some characteristic forenames: Japanese Masaaki, Takashi, Hiroyuki, Junichi, Kazuo, Masako, Tetsuo, Yoshito, Yuji, Yuki, Yuzo, Akira.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Koyama in the United States?
Based on data from the Decennial U.S. Census, the popularity of the surname Koyama in the United States has slightly decreased between 2000 and 2010. The rank of this surname fell from 28,730 to 29,626, indicating a decrease of 3.12%. However, the count of individuals with the surname increased by 1.92%, climbing from 780 in 2000 to 795 in 2010. There was a minor decline in the proportion per 100,000 people, showing a decrease of 6.9%.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #28,730 | #29,626 | -3.12% |
| Count | 780 | 795 | 1.92% |
| Proportion per 100k | 0.29 | 0.27 | -6.9% |
Race and Ethnicity of people with the last name Koyama
The ethnic identity associated with the surname Koyama, as per the Decennial U.S. Census data, is predominantly Asian/Pacific Islander, accounting for 77.48% of the bearers in 2010, down from 81.28% in 2000. The percentage of individuals identifying with two or more races has seen an increase of 33.39%, moving from 6.41% to 8.55%. People with this surname identifying as White increased by 8.51%, making up 9.18% of the total in 2010. There was also a rise in the Hispanic population, which increased by 34.39% to account for 4.65% of people with the Koyama surname. The census reported no change for those identifying as Black or American Indian and Alaskan Native.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Asian/Pacific Islander | 81.28% | 77.48% | -4.68% |
| White | 8.46% | 9.18% | 8.51% |
| Two or More Races | 6.41% | 8.55% | 33.39% |
| Hispanic | 3.46% | 4.65% | 34.39% |
| Black | 0% | 0% | 0% |
| American Indian and Alaskan Native | 0% | 0% | 0% |