Dumitru Constantin Moruzi (also known as Dimitrie Moruzi or Moruzzi; Russian: Дмитрий Константинович Мурузи, Dmitry Konstantinovich Muruzi; July 1 or 2, 1850 – October 9, 1914) was a Moldavian-born Imperial Russian and Romanian aristocrat, civil servant and writer. A scion of the prestigious Mourousis and Sturdza families, he was the son of adventurer Constantin D. Moruzi, who had switched his allegiance between Moldavia, Russia, and the United Principalities. Dumitru's uncle was Alexandru "Alecu" Moruzi, who briefly led the Moldavian government, while his stepsister Natalia Keșco-Moruzi was for a while queen of Serbia. Dumitru was also the maternal uncle of historian Gheorghe I. Brătianu.