Du Petit-Thouars may refer to:
Louis-Marie Aubert du Petit-Thouars (1758–1831), French botanist, brother of Aristide Aristide Aubert du Petit-Thouars (1760–1798), French Navy officer and hero of the Battle of the Nile, brother of Louis-Marie Abel Aubert du Petit-Thouars (1793–1864), a French Navy admiral who took possession of Tahiti for France Abel-Nicolas Bergasse du Petit-Thouars (1832–1890), French Navy admiral who participated to the Boshin War in Japan
See also Du Petit Thouars (disambiguation) , the name of several ships