Ioan Suciu (December 4, 1907 – June 27, 1953) was a Romanian bishop of the Greek-Catholic Church, born into a clerical family in Blaj.

Suciu studied in Rome, Italy first at Sant'Atanasio and then at the Pontificium Institutum Internationale Angelicum, the future Pontifical University of Saint Thomas Aquinas, Angelicum, where after six years of study he received a Doctorate in Sacred Theology on 29 November 1931, and was ordained to the priesthood.

He was eventually sent to the notorious Sighet Prison, where he died of illness.

[1] Streets are named after him in Oradea and Satu Mare.

On June 2, 2019, Suciu and six other Romanian prelates were beatified by Pope Francis at Câmpia Libertății in Blaj.