Explore the Family Name Onishi

The meaning of Onishi

Japanese (Ōnishi): written 大西 ‘great west’. It is a habitational name taken from a village in Awa (now Tokushima prefecture) by members of the Ogasawara family, who were of Minamoto descent. This surname is also found in Okinawa. Some characteristic forenames: Japanese Hideo, Hiromi, Shizuo, Akira, Hiroshi, Kazuyoshi, Kenichi, Masashi, Masato, Mayumi, Nobuhiro, Takehiro.

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

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

According to the Decennial U.S. Census, the popularity of the surname Onishi has seen a slight decrease between 2000 and 2010. In 2000, Onishi was ranked as the 33,735th most popular surname in the United States, but by 2010, it had dropped to the 35,993rd spot. This represents a change of -6.69%. The total count of individuals with this surname also decreased from 637 in 2000 to 623 in 2010, a decrease of 2.2%. The proportion of people named Onishi per 100k people also reduced by 12.5% over the same period.

20002010Change
Rank#33,735#35,993-6.69%
Count637623-2.2%
Proportion per 100k0.240.21-12.5%

Race and Ethnicity of people with the last name Onishi

In terms of ethnicity associated with the surname Onishi, data from the Decennial U.S. Census reveals that most people who bear the surname identify as Asian/Pacific Islander. However, this percentage has decreased from 85.87% in 2000 to 80.58% in 2010. Simultaneously, there's been a significant increase in the number of individuals identifying as two or more races, from 5.65% to 10.11%. The percentage of people with the Onishi surname who identify as White has also increased slightly, from 6.28% to 7.70%. The number of Hispanic individuals with this surname has decreased by 21.08%, while the Black and American Indian and Alaskan Native categories remained at 0% for both years surveyed.

20002010Change
Asian/Pacific Islander85.87%80.58%-6.16%
Two or More Races5.65%10.11%78.94%
White6.28%7.7%22.61%
Hispanic2.04%1.61%-21.08%
Black0%0%0%
American Indian and Alaskan Native0%0%0%