Surname Dagneau (Dagneau 
) , all over the world, is a rare last name. The surname Dagneau is habitual in France, where it is a rare surname, Belgium, and Canada. Measured by absolute frequency, it is the most numerous in France, Canada, and the United States.
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| Dagneau | Belgium, Canada, United States, New Zealand, France |
| louis alexandre dagneau FR (b. 1819) |
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| pierre calixte dagneau physician and professor at Université Laval, CA (b. 1877) |
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| jacques dagneau historian and professor at Université Laval, CA (b. 1941) |
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| gilles dagneau French film director and biographer, FR (b. 1952) |
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