Jean-Baptiste Joseph René Poulain (French pronunciation: [ʒɑ̃ batist ʒozɛf ʁəne pulɛ̃]; ?
— Héros, off Trafalgar, 21 October 1805) was a French Navy officer.
As a Commander, he captained the 74-gun Héros.
He took part in the Battle of Trafalgar, where he was mortally wounded at 13:15.
Lieutenant Conor replaced him as captain of Héros.