Dumitru Diacov (born 10 February 1952) is a Moldovan politician, former President of the Moldovan Parliament, member of the Parliament of Moldova in several consecutive terms since the year 2005 and formerly between 1994 and 2001.

Dumitru Diacov was born on 10 February 1952 in Kargapolie, Kurgan Oblast (Russia), in a family of Bessarabian deportees.

In 1969, he became a student at the Faculty of Letters, Journalism Department, of the Moldova State University from Chișinău.

In 1974, Dumitru Diacov graduated from Belarusian State University and then worked for TeleRadio-Moldova.

After 1984, he worked as correspondent in Chişinău for Komsomolskaya Pravda and then for Komsomol and CPSU in Moscow (1986–1989).