Last name Deblock (Deblock 
) , worldwide, is quite a rare cognomen. The family name Deblock is habitual in Belgium, where it is quite a rare surname, France, and Canada, where it is a rare surname. Not in comparison with a country's population, the name is most common in France, the United States, and Belgium.
| VARIANT | COUNTRY |
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| Deblock | Canada, France, United Kingdom, United States, Belgium |
| roger deblock French politician, FR (b. 1908) |
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| paulette deblock French politician, FR (b. 1923) |
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| stéphane deblock French parasitologist (1925–2016), FR (b. 1925) |
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| gabriel deblock French politician, FR (b. 1935) |
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| alain deblock French politician, FR (b. 1950) |
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| christian deblock CA (b. 1953) |
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| pierre deblock French association football player, FR (b. 1973) |
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| richard deblock researcher |
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| auguste deblock French politician, FR |
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| ryan deblock researcher |
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| françois deblock French actor, FR (b. 1988) |
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