Explore the Family Name Kosaka
The meaning of Kosaka
Japanese: written 小阪 in Okinawa and western Japan, or 小坂 in central Japan, meaning ‘small slope’. Both can also be pronounced Osaka.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Kosaka in the United States?
Based on the Decennial U.S. Census data, the popularity of the surname Kosaka exhibited a growth between 2000 and 2010. In 2000, it was ranked 58,553rd with 324 occurrences, while in 2010, it climbed to the 56,073rd spot with 365 instances, indicating a growth of 12.65% over the decade. However, its proportion per 100,000 population remained constant at 0.12, underscoring that while its rank has improved, its density among the U.S. population has remained stable.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #58,553 | #56,073 | 4.24% |
| Count | 324 | 365 | 12.65% |
| Proportion per 100k | 0.12 | 0.12 | 0% |
Race and Ethnicity of people with the last name Kosaka
Turning to the ethnic identity associated with the surname Kosaka, the Decennial U.S. Census indicates a slight increase in Asian/Pacific Islander representation from 83.64% in 2000 to 84.11% in 2010. During the same period, individuals identifying with two or more races also increased by 7.51%, rising from 5.86% to 6.30%. Conversely, those who identified as White decreased by 15.32%, falling from 6.79% to 5.75%. The Hispanic population experienced an increase of 15.21%, albeit from a smaller base of 3.09% in 2000 to 3.56% in 2010. There were no individuals who identified as Black, American Indian, or Alaskan Native in either census year.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Asian/Pacific Islander | 83.64% | 84.11% | 0.56% |
| Two or More Races | 5.86% | 6.3% | 7.51% |
| White | 6.79% | 5.75% | -15.32% |
| Hispanic | 3.09% | 3.56% | 15.21% |
| Black | 0% | 0% | 0% |
| American Indian and Alaskan Native | 0% | 0% | 0% |