Family name Sillito (Sillito 
) , in all the world, is a rare surname. The surname Sillito is habitual in Canada, where it is a rare surname, New Zealand, and the United Kingdom. Measured by absolute frequency, it is the most numerous in Canada, the United Kingdom, and the United States.
| VARIANT | COUNTRY |
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| Sillito | Canada, New Zealand, United States, United Kingdom, South Africa |
| harry sillito Footballer (1901-1993), GB (b. 1901) |
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| kenneth sillito English violinist and conductor, GB (b. 1939) |
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| frank sillito college basketball player (1949–1949) Saint Joseph's |
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