Surname Garnham (Garnham 
) , in the entire world, is quite a rare cognomen. The last name Garnham is habitual in Guernsey, where it is quite a common surname, the United Kingdom, where it is quite a rare surname, and New Zealand. Not in comparison with a country's population, it is commonest in the United Kingdom, Australia, and the United States.
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| Garnham | Canada, Australia, Chile, United States, United Kingdom |
| garnham blaxcell (1778-1817) merchant and trader (b. 1778) |
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| john garnham British Royal Navy officer, lieutenant in 1815 (1789-?) (b. 1789) |
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ignacio lorca garnham Chilean lawyer, CL (b. 1897) |
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cyril garnham British parasitologist, GB (b. 1901) |
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| garnham edmonds British politician (1866-1946), GB (b. 1866) |
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| percy c. garnham (born 1876) (b. 1876) |
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| hilda garnham (born 1903) (b. 1903) |
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| eileen garnham (born 1907) (b. 1907) |
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scott garnham British actor, GB (b. 1985) |
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| nicholas garnham British academic (b. 1937) |
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| david garnham (b. 1942) |
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| alan garnham researcher (b. 1954) |
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| stuart garnham English footballer (born 1955), GB (b. 1955) |
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| piers alexander garnham (born 1958), GB (b. 1958) |
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| neil garnham British judge, GB (b. 1959) |
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