Family name 北原 (Kitahara 
, 北原 ) , globally, is quite a rare cognomen. The surname 北原 is characteristic of Hong Kong, where it is a rare surname, Japan, and Singapore. Measured by absolute frequency, it most frequently occurs in Brazil, Japan, and Indonesia. Very seldom, 北原 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kitahara | Indonesia, Japan, China, Brazil, United States |
| 北原 | China |
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北原昇 Japanese baseball player, JP (b. 1917) |
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| 北原じゅん Japanese composer, music arranger and lyricist, JP (b. 1929) |
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| 北原光広 Japanese teacher, JP (b. 1953) |
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| 北原ちあき Japanese actress and AV idol, JP (b. 1964) |
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| 北原夏美 Japanese AV idol, JP (b. 1966) |
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| 北原 みのり Japanese writer, JP (b. 1970) |
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| 北原まゆみ Japanese AV idol, JP (b. 1977) |
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| 北原愛子 Japanese singer, JP (b. 1982) |
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| 北原亘 futsal player, JP (b. 1982) |
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| 北原沙弥香 Japanese singer and actress, JP (b. 1993) |
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