Surname Ishihara (Ishihara 
, 石原 , いしはら) , in the world, is quite a rare cognomen. The family name Ishihara is habitual in Japan, where it is a rare surname, Lithuania, and Singapore. Measured by absolute frequency, it is commonest in Japan, the United States, and Brazil. Also, Ishihara is the forename as well as the last name.
| masakira ishihara (b. 1760) |
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| ishihara shikō Japanese historian, educator, and author (1874–1936) (b. 1874) |
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| ishihara kōichiro (b. 1890) |
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| teru ishihara (b. 1926) |
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| shigeo ishihara politician (b. 1947) |
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| mario ishiki ishihara botanist (b. 1956) |
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| sayuri ishihara Japanese AV idol (b. 1958) |
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| junko ishihara (b. 1968) |
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| masahiro ishihara researcher |
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| hiroki ishihara researcher (ORCID 0000-0003-2953-1561) |
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| takeshi ishihara researcher |
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| yuri ishihara researcher |
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| shinji ishihara researcher |
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| junko ishihara researcher ORCID ID = 0000-0002-9516-5646 |
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| makoto ishihara botanist |
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