Stefan Lehne (born 1951) is currently Senior Fellow at Carnegie Europe (Brussels) and lecturer at the Diplomatic Academy in Vienna.
His diplomatic career included positions as director general for political affairs in the Austrian Foreign Ministry and director for the Balkans and Eastern Europe in the General Secretariat of the Council of the EU. As an Austrian diplomat he mostly dealt with multilateral processes including the UN, the CSCE and the EU. His current research focuses on the reform prospects of the EU and on EU foreign policy.