Christ Church South is a constituency in the Christ Church area of Barbados represented in the House of Assembly of the Barbadian Parliament since 2008 by Ralph A. Thorne, MP of the Barbados Labour Party.^{[n 1]}

Since its founding in 1991 it has mostly been held by the BLP.

From a point on the sea coast south of the terminus of the School Hill-St. Christopher Road in a straight line to the terminus of the School Hill-St. Christopher Road; thence in a northerly direction along the middle of the School Hill-St. Christopher Road to its junction with the Sayes Court-Hopewell Road; thence in a westerly direction along the middle of the Sayes Court-Hopewell Road to its junction at the roundabout with Highway U (the Hopewell-Chancery Lane Road); thence in a westerly direction along the middle of Highway U to its junction with Waverley Road; thence in a northerly direction along the middle of Waverley Road to its junction with Pegwell Boggs Road ; thence in an easterly direction along the middle of Pegwell Boggs Road to its junction with Pegwell Boggs New Road; thence in a northerly direction along the middle of Pegwell Boggs New Road to its junction with Gibbons Road; thence in a westerly direction along the middle of Gibbons Road to its junction with Highway 7 (the Oistins-Airport Road); thence in a south westerly direction along the middle of Highway 7 to its junction with Church Hill Road; thence in a westerly direction along the middle of Church Hill Road to its junction at the top of Oistins Hill with Cane Vale Road-Maxwell Hill; thence in a westerly direction along the middle of Cane Vale-Maxwell Hill to its junction with the Maxwell Hill-Graeme Hall Terrace Road; thence in a north westerly direction along the middle of the Maxwell Hill-Graeme Hall Terrace Road to its junction with the Errol Barrow Highway opposite the Ministry of Agriculture Building; thence in a northerly and then westerly direction along the middle of the Errol Barrow Highway to the eastern boundary of the Rendezvous Ridge development; thence in a southerly direction along that boundary to the base of the Rendezvous Ridge; thence in a westerly direction along the base of the Rendezvous Ridge to its junction with the Rendezvous Hill Road; thence in a southerly direction along the middle of the Rendezvous Hill Road to its junction with Highway 7; thence in a straight line to a point on the southern sea coast south of the junction of the Rendezvous Hill Road with Highway 7; thence in an easterly direction along the sea coast to a point on the coast south of the terminus of the School Hill-St. Christopher Road (the starting point).