At least two ships of the Brazilian Navy have borne the name Piauí
- Brazilian monitor Piauí, a Pará-class monitor launched in 1868 and scrapped in 1893
- Brazilian destroyer Piauí (1908), a Pará-class destroyer launched in 1908 and stricken in 1944
This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.