Explore the Family Name Oishi

The meaning of Oishi

Japanese (Ōishi): written 大石 ‘large rock’, a topographic name. This surname is found mostly in eastern Japan and on the island of Okinawa. Listed in the Shinsen shōjiroku. Some characteristic forenames: Japanese Hiroshi, Isao, Kazuo, Kiyoshi, Masami, Noboru, Sadao, Takeshi, Yoshiro, Yutaka, Akio, Eiko.

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

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

Based on the Decennial U.S. Census data, the popularity of the surname Oishi has seen a noticeable increase between 2000 and 2010. The rank of the surname improved from 38,395th to 36,585th, marking an upward shift by 4.71%. In terms of raw count, the number of people with the last name Oishi also rose from 542 in 2000 to 611 individuals in 2010, representing a 12.73% surge. Similarly, the proportion of the surname Oishi per 100,000 people has also increased by 5% during this period.

20002010Change
Rank#38,395#36,5854.71%
Count54261112.73%
Proportion per 100k0.20.215%

Race and Ethnicity of people with the last name Oishi

The Decennial U.S. Census data on ethnicity associated with the surname Oishi revealed some changes from 2000 to 2010 as well. The majority of Oishis identified as Asian/Pacific Islander, although the percentage decreased slightly from 82.84% to 78.72%, a change of -4.97%. Those who identified as having two or more races increased by 11.7%, rising from 9.23% to 10.31%. White Oishis experienced an increase of 13.93%, moving from 6.46% to 7.36%. The most significant change was observed in the Hispanic group, which saw an explosive growth of over 224%, jumping from 1.11% to 3.6%. There were no Oishis who identified as Black or American Indian and Alaskan Native in either 2000 or 2010.

20002010Change
Asian/Pacific Islander82.84%78.72%-4.97%
Two or More Races9.23%10.31%11.7%
White6.46%7.36%13.93%
Hispanic1.11%3.6%224.32%
Black0%0%0%
American Indian and Alaskan Native0%0%0%