Cognomen Saint-Hilaire (Saint-Hilaire 
) , around the globe, is quite a rare surname. The surname Saint-Hilaire is habitual in Haiti, where it is quite a rare surname, the Dominican Republic, and France, where it is a rare surname. Very seldom, Saint-Hilaire is the forename as well as the last name. Parts of the name also exists independently as a first name Saint, and a first name Hilaire.
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| Saint-Hilaire | Canada, Haiti, Dominican Republic, France, United States |
| gilbert de saint-hilaire (b. 1600) |
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| léonor foy de saint-hilaire FR (b. 1624) |
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étienne geoffroy saint-hilaire French naturalist who established the principle of "unity of composition" (1772-1844), FR (b. 1772) |
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| philippe dequeux de saint-hilaire French politician, FR (b. 1766) |
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| jean henri jaume saint-hilaire French botanist (1772-1845), FR (b. 1772) |
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| eugène rosseeuw saint-hilaire French historian (1805-1889), FR (b. 1805) |
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| marie-jean blanc saint-hilaire FR (b. 1805) |
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| albert geoffroy saint-hilaire French zoologist and ornithologist (1835-1919), FR (b. 1835) |
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| élie saint-hilaire Canadian politician (1839-1888), CA (b. 1839) |
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| auguste-henry-édouard queux de saint-hilaire FR (b. 1837) |
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| louis saint-hilaire Canadian painter, CA (b. 1860) |
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| étienne geoffroy saint-hilaire French politician (1868-1947), FR (b. 1868) |
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| paul de saint-hilaire Belgian writer, BE (b. 1926) |
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| claude saint-hilaire CA (b. 1927) |
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| gilles saint-hilaire Canadian physicist, CA (b. 1948) |
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