The Bossey Ecumenical Institute (Ecumenical Institute Bossey) is the ecumenical institute of the World Council of Churches. It was founded in 1946. The dean of the Institute is the Rev. Dr Simone Sinn. Degrees and other academic awards are accredited by the University of Geneva.
It is situated in Switzerland at the Chateau de Bossey, between the villages of Bogis-Bossey and Céligny, near Geneva.
The institute offers a variety of academic programs and courses in theology, including graduate-level programs in ecumenical studies, interreligious dialogue, and pastoral ministry.