Harro Adt (born 20 May 1942) is a German diplomat.
Adt studied law in Tübingen, Munich and Freiburg; He passed his first state examination in 1969.
Adt was accredited in Kabul, Calcutta, Geneva, Paris and Brussels.
In 2003, he was Ministerial Director of Monsieur Afrique in the government of Gerhard Schröder.
After working as ambassador to Mali, he traveled again to the Malian capital Bamako on 22 July 2003, together with the then State Secretary Jürgen Chrobog, in order to work with the Malian government to find a solution to the hostage-taking in the Sahara.