Erected as the Diocese of Galle in 1939, the diocese is suffragan to the Archdiocese of Colombo. In 1995, part of the diocese was split off to form the Diocese of Kurunegala.
The current bishop is Warnakulasurya Wadumestrige Devasritha Valence Mendis, appointed in 2006.
St. Mary's Cathedral, Chilaw
Ordinaries
Louis Perera, O.M.I. † (5 Jan 1939 Appointed - 8 Apr 1939 Died)
Edmund Peiris, O.M.I. † (12 Jan 1940 Appointed - 27 Dec 1972 Resigned)
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