Family name Decaux (德科 
, Decaux 
, Deaux 
) , in all the world, is quite a common last name. The family name Decaux is habitual in France, where it is quite a rare surname, Belgium, and Uruguay, where it is a rare surname. In absolute terms, it is commonest in France, China, and the Democratic Republic of the Congo. Likewise, Decaux is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 德科 | China |
| Decaux | Belgium, United States, Argentina, France, Democratic Republic of the Congo |
| Deaux | United Kingdom, Australia, United States, Canada, France |
| Дэко | Russia |
| iphigénie decaux French painter, FR (b. 1778) |
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| charles decaux French woodcarver, FR (b. 1800) |
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abel decaux French organist and composer, FR (b. 1869) |
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| georges decaux French publisher, FR (b. 1845) |
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alain decaux French historian (1925-2016), FR (b. 1925) |
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| paul decaux French architect, FR (b. 1881) |
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| francis decaux father of Alain Decaux (1888-1958), FR (b. 1888) |
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| bernard decaux French physicist, FR (b. 1899) |
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| jules decaux French politician, FR (b. 1904) |
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| jacques decaux French sports shooter, FR (b. 1918) |
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| etienne decaux French linguist and grammarian (1926-1976), FR (b. 1926) |
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| roger decaux (b. 1919) |
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| georges decaux road bicycle racer, FR (b. 1930) |
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alice decaux French athletics competitor, FR (b. 1985) |
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| jean-claude decaux French businessman, FR (b. 1937) |
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