Last name Delacour (Delacour 
) , throughout the world, is quite a rare cognomen. The family name Delacour is habitual in Western Europe, particularly France, where it is quite a rare surname, Belgium, where it is a rare surname, and Switzerland. Not in comparison with a country's population, it is commonest in France, the United States, and the United Kingdom. Much less frequently, Delacour is the forename as well as the last name.
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| Delacour | Australia, France, Argentina, United Kingdom, United States |
| claude charles delacour d'ambézieux French politician (1733-1792), FR (b. 1733) |
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| nicolas pierre antoine delacour French politician, FR (b. 1738) |
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| alexandre-adolphe delacour French politician, FR (b. 1797) |
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| charles delacour FR (b. 1795) |
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| vincent delacour French composer, FR (b. 1808) |
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| alfred delacour French playwright and librettist, FR (b. 1817) |
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| albert delacour French politician (1825-1890), FR (b. 1825) |
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jean théodore delacour French-American ornithologist (1890-1985), FR (b. 1890) |
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| théodore auguste delacour FR (b. 1831) |
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| josephine white delacour American physician and suffragist, the first woman physician in Delaware (about 1849 -1929), US (b. 1849) |
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| charles delacour FR (b. 1843) |
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| elizabeth delacour-bonnamour FR (b. 1852) |
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| clovis delacour FR (b. 1859) |
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| albert delacour French writer, FR (b. 1877) |
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| reginald b. delacour American military personnel (1886-1948), US (b. 1886) |
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