Last name Décoste (Décoste 
) , in all the world, is a very rare cognomen. The last name Décoste is habitual in New Zealand, where it is a rare surname, and Canada, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Décoste | Canada, New Zealand |
| jean-baptiste décoste Haitian catholic priest (1925-1980), HT (b. 1925) |
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| gontran décoste Haitian bishop, HT (b. 1957) |
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