Constantin Mugur Isărescu (Romanian pronunciation: [ˈmuɡur isəˈresku]; born 1 August 1949) is the governor of the National Bank of Romania, a position he has been holding since September 1990, with the sole exception of a period of time of one year (22 December 1999 to 28 December 2000), during which he served as Prime Minister of Romania.

[1] During this period he gave notes under several aliases to the Communist Secret Services about ladies with different problems, about colleagues at the institute, and about the foreigners he was meeting.

[7] In 1999, Isărescu was asked to become Prime Minister of Romania, which he accepted on the condition that he could return to the National Bank after it was over.

[1] Then-President Emil Constantinescu agreed with the terms[1] and on 16 December 1999 Isărescu was sworn in as Prime Minister of Romania, but only for about a year, since in November 2000, the ruling coalition lost the election.

In November 2000 Isărescu ran for President of Romania but was soundly defeated, coming in fourth place and receiving 9% of the vote.

Isărescu declined the offer from President Băsescu, refusing to re-assume his former office in order to remain Governor of BNR.