Cognomen Dilworth (Dilworth 
) , in the world, is quite a common surname. The cognomen Dilworth is habitual in Jamaica, where it is quite a rare surname, Ireland, and the United Kingdom. Not in comparison with a country's population, it most frequently occurs in the United States, the United Kingdom, and Canada. Very seldom, Dilworth is the forename as well as the last name.
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| Dilworth | Canada, Jamaica, Ireland, United Kingdom, United States |
| a. b. dilworth American farmer, politician, and military officer, US (b. 1814) |
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| james dilworth Farmer, investor, speculator, philanthropist (1815-1894), NZ (b. 1815) |
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| william j. dilworth Irish educationalist (b. 1863) |
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robert l. dilworth American Army general and educator, US (b. 1936) |
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| nelson s. dilworth American politician, US (b. 1890) |
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| ira dilworth Canadian choirmaster, CBC executive, and arts leader, CA (b. 1894) |
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| arthur dilworth American baseball player, US (b. 1894) |
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john r. dilworth American animator, US (b. 1963) |
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| dilworth wayne woolley Canadian-born American biochemist, CA (b. 1914) |
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| robert dilworth American mathematician, US (b. 1914) |
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| paul bernard dilworth aeronautical engineer (1915-2007), CA (b. 1915) |
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| j. richardson dilworth American businessman (b. 1916) |
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| gordon dilworth (b. 1913) |
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| constance charlotte dilworth British physicist, GB (b. 1924) |
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| norman dilworth artist, GB (b. 1931) |
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