The Roman Catholic Metropolitan Archdiocese of Chongqing (formerly spelt Chungking) (Latin: Archidioecesis Ciomchimensis; Chinese: 天主教重慶總教區) is a Latin Catholic Metropolitan archdiocese located in southwestern China, yet still depends on the missionary Roman Congregation for the Evangelization of Peoples.

Established on 2 April 1856 as the Apostolic Vicariate of Southeastern Szechwan, its archiepiscopal see is the Cathedral of St. Joseph, located in the provincial-level city of Chongqing, which lies in the eastern part of the mission territory, hence the designation of Eastern Szechwan Mission.

The archdiocese covers the southern part of Chongqing (Tchong-kin-fou), while the north, including 1 district and 8 counties, is under the jurisdiction of the Bishop of Wanxian (Ouan-hien).

In 1950, it pastorally served 37,608 Catholics (0.3%) on 135,187 square miles in 42 parishes with 85 diocesan priests and 120 religious (only 6 males).

Its suffragan sees are: All Roman Rite, so far members of a Latin missionary congregation.