Pierre Charles José Marie, Count Harmel (French pronunciation: [pjɛʁ aʁmɛl]; 16 March 1911 – 15 November 2009) was a Belgian lawyer, Christian Democratic politician and diplomat.

When the 1954 elections brought to power a coalition of Socialists and Liberals, the new Education Minister, Leo Collard, immediately set out to reverse the measures taken by his predecessor, sparking mass protests by the Catholic bloc.

Prime Minister of Belgium from 28 July 1965 until 19 March 1966, Harmel led a coalition comprising Christian Democrats and Socialists.

Finally, he was Minister of Foreign Affairs in the Liberal-Christian Democratic coalition led by Paul Vanden Boeynants (19 March 1966 – 7 February 1968).

As Foreign Minister he chaired the opening meeting of the enlargement negotiations between the EEC and the four applicants for Community membership in June 1970.

The Harmel Doctrine helped to pave the way for the east–west détente of the early 1970s, which led to the 1975 Helsinki Summit and the creation of the OSCE.