Dennis Deletant OBE (born 5 March 1946[2]) is a British-Romanian historian of the history of Romania.

[3] Deletant had been persona non grata in Ceaușescu's Romania, but on 31 December 1989, in the immediate aftermath of the Romanian Revolution—there was still some sniper fire, etc.—Deletant entered Romania at Giurgiu as the only Romanian-language speaker in a BBC crew coming in from Bulgaria, joining another BBC team already in Bucharest and, in what he was later to describe as his Warholian "fifteen minutes of fame," reported on the subsequent events.

[2] Besides his longtime affiliation with SSEES, Deletant served from 1990 to 1999 on the board of the British Government's ‘Know-How Fund for Central and Eastern Europe’.

He was actively involved in that organization's work in Romania and in the Republic of Moldova, was Rosenzweig Family Fellow at the Center for Advanced Holocaust Studies at the United States Holocaust Memorial Museum in 2000 and 2001, and was Professor of Romanian Studies at the University of Amsterdam (on secondment from UCL) from 2003 to 2010.

[3] In 2016 he was awarded by President Klaus Iohannis the Order of the Star of Romania, Officer rank.